7-Day IL
Injury Achilles
Est. Return 4/9/2026
2026 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
Signed a minor-league contract with the Cubs in January of 2026.
Inks deal with Cubs
Thornton (Achilles) agreed to a minor-league contract with the Cubs on Monday.
Analysis
Thornton landed a deal after throwing for teams in a "Pro Day" at Tread Athletics training facility. The righty reliever underwent surgery in August to repair a torn left Achilles tendon but has a chance to be ready in time for Opening Day. He posted a 4.68 ERA, 1.30 WHIP and 32:14 K:BB over 42.1 innings for the Mariners in 2025 before getting hurt.
Thornton landed a deal after throwing for teams in a "Pro Day" at Tread Athletics training facility. The righty reliever underwent surgery in August to repair a torn left Achilles tendon but has a chance to be ready in time for Opening Day. He posted a 4.68 ERA, 1.30 WHIP and 32:14 K:BB over 42.1 innings for the Mariners in 2025 before getting hurt.
Pitching Stats
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2025 MLB Game Log
2025
2024
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2021
2020
2019
Minor League Game Log
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Left/Right Pitching Splits
Since 2024
-18%
BAA vs RHP
2026
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .271 | 58 | 17 | 54 | 6 |
| Since 2024vs Right | .222 | 51 | 16 | 50 | 8 |
| 2026vs Left | 0 | 0 | 0 | 0 | 0 |
| 2026vs Right | 0 | 0 | 0 | 0 | 0 |
| 2025vs Left | .286 | 20 | 9 | 22 | 3 |
| 2025vs Right | .232 | 12 | 5 | 19 | 3 |
| 2024vs Left | .262 | 38 | 8 | 32 | 3 |
| 2024vs Right | .217 | 39 | 11 | 31 | 5 |
Home/Away Pitching Splits
Since 2024
-12%
ERA on Road
2026
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2024Home | 4.28 | 1.08 | 54.2 | 8.9 | 1.8 |
| Since 2024Away | 3.75 | 1.30 | 60.0 | 8.3 | 3.3 |
| 2026Home | 0 | 0 | 0 | 0 | 0 |
| 2026Away | 0 | 0 | 0 | 0 | 0 |
| 2025Home | 5.89 | 1.20 | 18.1 | 7.4 | 1.5 |
| 2025Away | 3.75 | 1.38 | 24.0 | 6.4 | 4.1 |
| 2024Home | 3.47 | 1.02 | 36.1 | 9.7 | 2.0 |
| 2024Away | 3.75 | 1.25 | 36.0 | 9.5 | 2.8 |
Minor League Left/Right Pitching Splits (AAA)
Since 2024
Even Split
2026
No Stats
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2024vs Left | .200 | 1 | 0 | 1 | 1 |
| Since 2024vs Right | .200 | 2 | 0 | 1 | 0 |
| 2026vs Left | 0 | 0 | 0 | 0 | 0 |
| 2026vs Right | 0 | 0 | 0 | 0 | 0 |
| 2025vs Left | .200 | 1 | 0 | 1 | 1 |
| 2025vs Right | .200 | 2 | 0 | 1 | 0 |
| 2024vs Left | 0 | 0 | 0 | 0 | 0 |
| 2024vs Right | 0 | 0 | 0 | 0 | 0 |
Prospect Rankings History
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2021
2020
Thornton was feared to have required Tommy John surgery, but he only needed surgery to remove loose bodies in his right elbow at the beginning of September. As a result, he should be ready for the start of the 2021 campaign. The right-hander battled elbow issues over most of the season in 2020, and he only made three starts as a result. Thornton's production was skewed by a limited sample, but he still improved to a 2.66 FIP, although his 5.22 SIERA left something to be desired. He showed promise during his rookie season in 2019, but it's not yet clear how he'll perform after surgery. Thornton has a five-pitch arsenal, but he has a middling 92.2 mph average fastball velocity, and his strikeout rate hasn't jumped off the page. The 27-year-old demonstrated some effectiveness over his first two years in the majors, but he hasn't done enough to warrant a roster spot in most fantasy leagues to begin 2021.
More Fantasy News
Non-tendered by Mariners
The Mariners non-tendered Thornton (Achilles) on Friday, Daniel Kramer of MLB.com reports.
Analysis
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Shifted to 60-day injured list
The Mariners transferred Thornton (Achilles) from the 15-day injured list to the 60-day injured list Tuesday.
Analysis
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Facing 6-to-8-month recovery
Thornton underwent season-ending surgery Monday to repair a torn left Achilles tendon and is expected to face a recovery timeline of 6-to-8 months, Daniel Kramer of MLB.com reports.
Analysis
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Diagnosed with torn Achilles
The Mariners placed Thornton on the 15-day injured list Friday due to a torn left Achilles tendon.
Analysis
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Achilles injury feared
Thornton was on crutches following Thursday's game against the Rangers and believes he suffered a serious Achilles injury, Daniel Kramer of MLB.com reports.
Analysis
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Latest Fantasy Rumors
Favorite for starting role
Thornton is the favorite to be named the fifth starter in the Blue Jays' rotation to begin the season, Scott Mitchell of TSN.ca reports.
Analysis
Thornton surprisingly emerged to pitch the most innings for the big-league team in 2019. However, the club added a number of arms this offseason and also has multiple prospects who are close to major-league ready. That said, even if Thornton manages to earn a starting role out of camp, he'll need to perform well to maintain it.
Thornton surprisingly emerged to pitch the most innings for the big-league team in 2019. However, the club added a number of arms this offseason and also has multiple prospects who are close to major-league ready. That said, even if Thornton manages to earn a starting role out of camp, he'll need to perform well to maintain it.