The Seattle Mariners activated a new member to their team Saturday, making a roster move of a different sort. The latest addition is team-friendly in all ways with his contract paid in treats and belly rubs. He’s tireless in his pursuit of the baseball with closing speed aided by two extra legs. Though his version of the spitball — more of a slobber ball — can be a bit overwhelming.
But within a day and a half of arriving at T-Mobile Park, he’s already taken over as the most popular member of the Mariners.
“We do have another addition of the roster today,” manager Scott Servais said in his pregame media session before Game 1 of Saturday’s doubleheader. “We have a team dog; Tucker’s in the house.”
Indeed, Tucker, a 4-year-old yellow lab/golden retriever mix, was officially announced as the team dog after hanging out in the clubhouse the past few days.
“We actually brought him in right after the All-Star break and kind of got him introduced to the guys and then we went on the road trip, but he did not travel with us,” Servais said. “So he’s been activated today. He’s a great addition to our team. It’s fun. It’s fun for the guys.”
In a statement from his Twitter account — @MarinersPup — that features a well-produced video of him running around, Tucker the Mariners dog tweeted: “I’m gonna get to hang out at the ballpark all the time, travel with the squad and enjoy my very own unlimited supply of baseballs. Doesn’t get better than this!”
The Mariners adopted Tucker through OkanDogs, a nonprofit shelter started by Tom and Jan Short in Cashmere.
Servais and his wife, Jill, have been big proponents of animal shelters and rescue dog organizations.
Jill Servais has worked in animal welfare for 30-plus years, getting her start at a municipal shelter in Tucson, Arizona, while Scott was playing minor-league baseball. They have a rescue dog named Wilson.
“She’s very involved,” Scott said. “It’s her passion.”
At the Bark in the Park events held by the Mariners this season, Jill helped push for animal shelters to promote dog adoption by having different shelters bring adoptable puppies to T-Mobile Park.
At the most recent event, OkanDogs, Forgotten Dogs Rescue and Sunny Skys Animal Rescue had puppies on the field that grabbed the attention of players.
In January, the Servaises got a private plane to pick up 11 adopted puppies from OkanDogs and personally delivered five to Orcas Island and six to Friday Harbor.
“It’s really important to understand how many truly beautiful, adoptable animals are available in the state of Washington, in particular,” Jill Servais told the Times at the recent Bark in the Park event. “You don’t need to leave the state to find some great adoptable animals.”
While Tucker isn’t officially an emotional support dog, Scott Servais believes his presence is good for the players. Several players like Marco Gonzales, J.P. Crawford and Ty France are dog owners so they get a dog at home and at work now.
“We are just trying to bring awareness to rescues all over the state of Washington,” Servais said. “And there’s dogs out there for everybody and we hit a home run with this one. This little guy is great. Our players are excited about it. It’s a nice little distraction with him in the clubhouse. They love the little guy.”

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Tucker the rescue dog was called up to the big leagues by the Seattle Mariners.
The idea to have a dog in the clubhouse was something Servais considered for over a year.
“It needed to be the right one,” he said. “We have a great relationship with the people at OkanDogs and they called and said we might have the right one.”
Servais went into a deadpan on the typical MLB process, saying: “He was scouted very heavily. We ran people in there to cross-check him and this dog had big-time numbers. So, he went high in the draft and we are happy to have as a free-agent addition.”
Joking aside, Servais grew serious about animal rescue. He has not been afraid to voice his concern about social issues like voting rights, gun control and social justice.
“Hopefully this can create some awareness to dog rescues throughout the state of Washington,” Servais said. “It’s something that’s certainly needed. For people that are looking for dogs, you can get any type of dog anywhere, it’s out there for you. So adopt, don’t shop.”
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How to pick the right dog for your lifestyle
Samira, an 8-week-old Dachshund puppy, carries her water dish on June 18, 2018, in Wilmington, Mass. (AP Photo/Elise Amendola)
Samira, an 8-week-old Dachshund puppy, carries her water dish on June 18, 2018, in Wilmington, Mass. (AP Photo/Elise Amendola)
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How to pick the right dog for your lifestyle
Six-month-old Maltese pup Scooter sits dwarfed by a tea cup as owner Cheryl McKnight admires her tiny ball of fluff in Gisborne, New Zealand, on July 14, 2009. (AP Photo/Rebecca Grunwell)
Six-month-old Maltese pup Scooter sits dwarfed by a tea cup as owner Cheryl McKnight admires her tiny ball of fluff in Gisborne, New Zealand, on July 14, 2009. (AP Photo/Rebecca Grunwell)
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How to pick the right dog for your lifestyle
Samira, left, and Scarlett, 8-week-old Dachshund puppies, play in the grass June 18, 2018, in Wilmington, Mass. (AP Photo/Elise Amendola)
Samira, left, and Scarlett, 8-week-old Dachshund puppies, play in the grass June 18, 2018, in Wilmington, Mass. (AP Photo/Elise Amendola)
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How to pick the right dog for your lifestyle
A miniature schnauzer puppy is shown Feb. 18, 2001, in Spring, Texas. (AP Photo/David J. Phillip)
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How to pick the right dog for your lifestyle
Will Farkas embraces a puppy during the first morning of a camp for children whose lives have been touched by cancer in South Russell, Ohio, on Aug. 1, 2005. Each of the 12 campers was given a puppy to take care of and socialize with during the week-long camp. (AP Photo/Amy Sancetta)
Will Farkas embraces a puppy during the first morning of a camp for children whose lives have been touched by cancer in South Russell, Ohio, on Aug. 1, 2005. Each of the 12 campers was given a puppy to take care of and socialize with during the week-long camp. (AP Photo/Amy Sancetta)
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How to pick the right dog for your lifestyle
A litter of seven golden retriever puppies trots across the lawn at Mountain View Kennels in Williamsburg, Pa., on Nov. 2, 2005. (AP Photo/Carolyn Kaster)
A litter of seven golden retriever puppies trots across the lawn at Mountain View Kennels in Williamsburg, Pa., on Nov. 2, 2005. (AP Photo/Carolyn Kaster)
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How to pick the right dog for your lifestyle
Beyonce, left, a Dachsund puppy vying for the title of World's Smallest Dog, is held with her mom Casey, a mixed Dachshund and Chihuahua, on March 28, 2012, in New York. Animal rescuers in Northern California say Beyonce was so small at birth that she could fit into a spoon. (AP Photo/Bebeto Matthews)
Beyonce, left, a Dachsund puppy vying for the title of World's Smallest Dog, is held with her mom Casey, a mixed Dachshund and Chihuahua, on March 28, 2012, in New York. Animal rescuers in Northern California say Beyonce was so small at birth that she could fit into a spoon. (AP Photo/Bebeto Matthews)
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How to pick the right dog for your lifestyle
Puppies play during Animal Planet's Puppy Bowl in Silver Spring, Md. (AP Photo/Stephen J Boitano.)
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How to pick the right dog for your lifestyle
Ratchet, a puppy from Iraq who was rescued by a soldier from Minnesota, rests after arriving at Dulles International Airport in Chantilly, Va., on Oct. 20, 2008. The dog from Iraq arrived after a lengthy effort to reunite the pooch with the U.S. soldier who adopted him. (AP Photo/Jacquelyn Martin)
Ratchet, a puppy from Iraq who was rescued by a soldier from Minnesota, rests after arriving at Dulles International Airport in Chantilly, Va., on Oct. 20, 2008. The dog from Iraq arrived after a lengthy effort to reunite the pooch with the U.S. soldier who adopted him. (AP Photo/Jacquelyn Martin)
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How to pick the right dog for your lifestyle
Puppies Apple, left, and Curry tussle with a chew toy as they romp at ASPCA headquarters in New York on April 4, 2019. (AP Photo/Mark Lennihan)
Puppies Apple, left, and Curry tussle with a chew toy as they romp at ASPCA headquarters in New York on April 4, 2019. (AP Photo/Mark Lennihan)
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How to pick the right dog for your lifestyle
In this photo taken on July 16, 2009, Lily, a Chihuahua terrier mix with five legs, licks a bowl in Charlotte, N.C. (AP Photo/The Charlotte Observer, Jeff Siner)
In this photo taken on July 16, 2009, Lily, a Chihuahua terrier mix with five legs, licks a bowl in Charlotte, N.C. (AP Photo/The Charlotte Observer, Jeff Siner)
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How to pick the right dog for your lifestyle
Draco, a golden retriever puppy, enjoys a ride on the shoulder of owner Cyrus Scribner of Middlesex, Vt., on Sept. 30, 2010. (AP Photo/Toby Talbot)
Draco, a golden retriever puppy, enjoys a ride on the shoulder of owner Cyrus Scribner of Middlesex, Vt., on Sept. 30, 2010. (AP Photo/Toby Talbot)
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How to pick the right dog for your lifestyle
An animal control officer holds a puppy named Guess in Minneapolis on Feb. 18, 2011. (AP Photo/Jim Mone)
An animal control officer holds a puppy named Guess in Minneapolis on Feb. 18, 2011. (AP Photo/Jim Mone)
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How to pick the right dog for your lifestyle
Harbor, an 8-week-old Labrador retriever, takes a nap at the American Kennel Club headquarters in New York on March 28, 2018. (AP Photo/Mary Altaffer, File)
Harbor, an 8-week-old Labrador retriever, takes a nap at the American Kennel Club headquarters in New York on March 28, 2018. (AP Photo/Mary Altaffer, File)
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How to pick the right dog for your lifestyle
Pua, a 5-month-old French bulldog, poses for photographers at the American Kennel Club headquarters in New York on March 28, 2018. (AP Photo/Mary Altaffer, File)
Pua, a 5-month-old French bulldog, poses for photographers at the American Kennel Club headquarters in New York on March 28, 2018. (AP Photo/Mary Altaffer, File)
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How to pick the right dog for your lifestyle
Window shoppers look at a pair of Labrador puppies for sale at the Westside Pavilion Shopping Center in Los Angeles on Oct. 4, 2010. (AP Photo/Damian Dovarganes, file)
Window shoppers look at a pair of Labrador puppies for sale at the Westside Pavilion Shopping Center in Los Angeles on Oct. 4, 2010. (AP Photo/Damian Dovarganes, file)
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How to pick the right dog for your lifestyle
A chocolate lab puppy looks at the camera in New Hampshire in this Jan. 8, 2019, photo. (AP Photo/Elise Amendola)
A chocolate lab puppy looks at the camera in New Hampshire in this Jan. 8, 2019, photo. (AP Photo/Elise Amendola)
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How to pick the right dog for your lifestyle
In this Jan. 8, 2019, photo, inmate Jonathan Ladson cuddles with a chocolate lab puppy at Merrimack County Jail in Boscawen, N.H. The New Hampshire jail is the first in the state to partner prisoners with the "Hero Pups" program to foster and train puppies with the goal of placing them with military veterans and first responders in need of support dogs. (AP Photo/Elise Amendola)
In this Jan. 8, 2019, photo, inmate Jonathan Ladson cuddles with a chocolate lab puppy at Merrimack County Jail in Boscawen, N.H. The New Hampshire jail is the first in the state to partner prisoners with the "Hero Pups" program to foster and train puppies with the goal of placing them with military veterans and first responders in need of support dogs. (AP Photo/Elise Amendola)
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How to pick the right dog for your lifestyle
Officers introduce a litter of golden retriever puppies to be trained as police dogs during a skills presentation of the K-9 unit in La Paz, Bolivia, on April 5, 2019. (AP Photo/Juan Karita)
Officers introduce a litter of golden retriever puppies to be trained as police dogs during a skills presentation of the K-9 unit in La Paz, Bolivia, on April 5, 2019. (AP Photo/Juan Karita)
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How to pick the right dog for your lifestyle
Milo, a coonhound puppy born with "upside down paws," chews on a treat at his home at the Oliver and Friends Farm Rescue and Sanctuary in Luther, Okla., on Feb. 14, 2019. Milo was born with a congenital dislocation of both elbows that left his paws turned upside down. The condition was treated with surgery. (AP Photo/Sue Ogrocki)
Milo, a coonhound puppy born with "upside down paws," chews on a treat at his home at the Oliver and Friends Farm Rescue and Sanctuary in Luther, Okla., on Feb. 14, 2019. Milo was born with a congenital dislocation of both elbows that left his paws turned upside down. The condition was treated with surgery. (AP Photo/Sue Ogrocki)
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How to pick the right dog for your lifestyle
A puppy is on display at a pet store in Columbia, Md., on Aug. 26, 2019. (AP Photo/Jose Luis Magana)
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How to pick the right dog for your lifestyle
Puppies play in a cage at a pet store in Columbia, Md., on Aug. 26, 2019. (AP Photo/Jose Luis Magana, File)
Puppies play in a cage at a pet store in Columbia, Md., on Aug. 26, 2019. (AP Photo/Jose Luis Magana, File)
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How to pick the right dog for your lifestyle
Linda Eroh holds Sammy, a 12-year-old Shetland sheepdog, on Oct. 9, 2008, at her Douglassville, Pa., home. Eroh rescued Sammy from a puppy mill. (AP Photo/Carolyn Kaster)
Linda Eroh holds Sammy, a 12-year-old Shetland sheepdog, on Oct. 9, 2008, at her Douglassville, Pa., home. Eroh rescued Sammy from a puppy mill. (AP Photo/Carolyn Kaster)
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How to pick the right dog for your lifestyle
Ratchet, a puppy from Iraq who was rescued by a soldier from Minnesota, rests on arrival at Dulles International Airport in Chantilly, Va., on Oct. 20, 2008. The dog from Iraq has arrived after a lengthy effort to reunite the pooch with the U.S. soldier who adopted him. (AP Photo/Jacquelyn Martin)
Ratchet, a puppy from Iraq who was rescued by a soldier from Minnesota, rests on arrival at Dulles International Airport in Chantilly, Va., on Oct. 20, 2008. The dog from Iraq has arrived after a lengthy effort to reunite the pooch with the U.S. soldier who adopted him. (AP Photo/Jacquelyn Martin)
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How to pick the right dog for your lifestyle
Petula, a rescued pug, walks around during a rally on the front steps of the Statehouse in Indianapolis on April 23, 2009. A group of dog lovers called on lawmakers to regulate large-scale dog breeding operations in Indiana. (AP Photo/Darron Cummings)
Petula, a rescued pug, walks around during a rally on the front steps of the Statehouse in Indianapolis on April 23, 2009. A group of dog lovers called on lawmakers to regulate large-scale dog breeding operations in Indiana. (AP Photo/Darron Cummings)