Mattison was non-tendered by the Tigers on Friday.
Mattison was designated for assignment Tuesday after being selected by the Tigers in the Rule 5 Draft last year. He'll now be a free agent after reaching Triple-A Toledo in 2025.
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Tigers' Tyler Mattison: Removed from 40-man roster
Rotowire
The Tigers designated Mattison for assignment Tuesday, Cody Stavenhagen of The Athletic reports.
Mattison was added to the 40-man roster last November, but he finds himself on the other side of Rule 5 cutdown day this time around. The right-hander has yet to make his major-league debut. He pitched mostly between Double-A and Triple-A this past season after recovering from right UCL reconstruction surgery.
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Tigers' Tyler Mattison: Off injured list
Rotowire
Mattison (elbow) was reinstated from Triple-A Toledo's 7-day injured list Saturday, Emily Waldon of Baseball America reports.
Mattison's recovery from Tommy John surgery is officially complete, as he's been activated from the Triple-A injured list 15 months after the procedure. The 25-year-old made nine appearances between Single-A and High-A during his rehab assignment, and he allowed seven runs with a 9:8 K:BB across 10.1 innings.
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Tigers' Tyler Mattison: In midst of rehab assignment
Rotowire
Mattison (elbow) made the second appearance of his rehab assignment Sunday with High-A West Michigan, striking out a batter and allowing one hit over a scoreless inning of relief.
Mattison has been on Triple-A Toledo's 7-day injured list all season while recovering from March 2024 Tommy John surgery, but he appears to be closing in on his 2025 debut with the Tigers' top minor-league affiliate. After tossing a scoreless inning in his first rehab appearance with Single-A Lakeland on Wednesday, Mattison bumped up a level Sunday. He could make a few more appearances with West Michigan or Double-A Erie before slotting into Toledo's bullpen.
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Tigers' Tyler Mattison: Slated for live batting practice
Rotowire
Mattison (elbow) will throw a live batting practice session Wednesday, Chris McCosky of The Detroit News reports.
Mattison is ready to face hitters as he continues to work his way back from Tommy John surgery. The 25-year-old has yet to pitch in the majors, but he's on the 40-man roster and could be an option for the Tigers' bullpen by June or so.
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Tigers' Tyler Mattison: Sent to Triple-A
Rotowire
Mattison (elbow) was optioned to Triple-A Toledo on Sunday, Evan Petzold of the Detroit Free Press reports.
The 25-year-old didn't see action in spring games while working through his rehab from Tommy John surgery. Mattison last pitched at the Double-A level in 2023 and had a 1.62 ERA over 33.1 innings, and he could be ready for action with Toledo at some point this summer.
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Tigers' Tyler Mattison: Going through bullpen work
Rotowire
Mattison (elbow) is throwing bullpen sessions twice per week, Evan Petzold of the Detroit Free Press reports.
Mattison is working his way back from right UCL reconstruction surgery, which he had last March. He isn't expected to be game-ready until June, at which point he'll likely be assigned to Triple-A Toledo.
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Tigers' Tyler Mattison: To begin bullpen progressions
Rotowire
Mattison (elbow) has been cleared to begin his bullpen progressions this week.
Mattison is working his way back from UCL reconstruction surgery and is moving in the right direction. The team doesn't expect the right-hander to be ready for game action until June, but his status will be worth monitoring as he clears obstacles in his rehab.
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Tigers' Tyler Mattison: Joins 40-man
Rotowire
The Tigers selected Mattison from Double-A Erie on Tuesday.
Mattison did not pitch in 2024 due to having UCL reconstruction surgery in March. He is currently expected to return next season, but not until June. His most recent appearances came with Double-A Erie in 2023, where he posted a 1.62 ERA across 22 appearances. The 25-year-old is now protected from the Rule 5 Draft.
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Tigers' Tyler Mattison: Undergoes Tommy John surgery
Rotowire
Mattison underwent UCL reconstruction surgery Friday, Evan Petzold of the Detroit Free Press reports.
Mattison was a fourth-round pick by the Tigers in the 2021 first-year player draft. The right-hander posted a 1.62 ERA, 1.15 WHIP and 46:18 K:BB over 33.1 innings with Double-A Erie last season.
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