Cooper Criswell| Year | W | L | Sv | Hold | IP | H | BB | SO | ER | ERA | WHIP | Rate |
| 2026 proj | 3 | 2 | 1 | 0 | 47.0 | 52 | 15 | 33 | 21 | 3.94 | 1.409 | 9.0 |
| 2026 | 0 | 0 | 1 | 0 | 6.0 | 4 | 1 | 7 | 2 | 3.00 | 0.833 | 48.4 |
| 2025 | 1 | 0 | 1 | 0 | 17.7 | 23 | 5 | 9 | 7 | 3.57 | 1.585 | 4.8 |
| 2024 | 6 | 5 | 0 | 0 | 99.3 | 101 | 31 | 73 | 41 | 3.71 | 1.329 | 25.9 |
| 2023 | 1 | 1 | 0 | 0 | 33.0 | 40 | 11 | 27 | 21 | 5.73 | 1.545 | -5.6 |
| 2022 | 0 | 0 | 0 | 0 | 3.3 | 2 | 1 | 4 | 1 | 2.70 | 0.900 | 1.5 |
| 2021 | 0 | 1 | 0 | 0 | 1.3 | 6 | 0 | 0 | 3 | 20.25 | 4.500 | -4.5 |
| Date | News |
| 3/10/26 | Mariners get solid start from Cooper Criswell in spring training victory. Right-hander Cooper Criswell delivered a solid start for the Mariners in Tuesday's 4-3 Cactus League win over the Royals. Source: https://www.seattletimes.com/sports/mariners/marin... |
| 3/04/26 | Mariners relievers Carlos Vargas, Jose Ferrer struggle in loss to Giants. While Cooper Criswell starred in his first spring start, Mariners relievers Carlos Vargas and Jose A. Ferrer struggled in the team's 9-4 loss to the Giants on Wednesday night. Source: https://www.seattletimes.com/sports/mariners/marin... |
| 1/26/26 | Mariners pick up RHP Criswell in trade with Mets. The Mets traded right-hander Cooper Criswell, who appeared in seven games for Boston last season, to the Mariners in exchange for cash. Source: https://www.espn.com/mlb/story/_/id/47709444/marin... |
| 1/26/26 | Mariners pick up RHP Criswell in trade with Mets. The Mets traded right-hander Cooper Criswell, who appeared in seven games for Boston last season, to the Mariners in exchange for cash. Source: https://www.espn.com/mlb/story/_/id/47709444/marin... |
| 1/25/26 | Mariners pick up RHP Criswell in trade with Mets. The Mets traded right-hander Cooper Criswell, who appeared in seven games for Boston last season, to the Mariners in exchange for cash. Source: https://www.espn.com/mlb/story/_/id/47709444/marin... |
| 1/24/26 | Mariners pick up RHP Criswell in trade with Mets. The Mets traded right-hander Cooper Criswell, who appeared in seven games for Boston last season, to the Mariners in exchange for cash. Source: https://www.espn.com/mlb/story/_/id/47709444/marin... |
| 1/23/26 | Mets trade RHP Cooper Criswell to Mariners for cash considerations. The Mets have traded right-hander Cooper Criswell to the Mariners for cash considerations, the team announced Friday. Source: https://sny.tv/articles/mets-trade-cooper-criswell... |
| 12/07/25 | Mets claim Red Sox castoff Criswell from waivers. The Mets claimed right-hander Cooper Criswell off waivers from the Red Sox just one day after he was designated for assignment. Source: https://www.espn.com/mlb/story/_/id/47214200/mets-... |
| 12/07/25 | Mets claim Red Sox castoff Criswell from waivers. The Mets claimed right-hander Cooper Criswell off waivers from the Red Sox just one day after he was designated for assignment. Source: https://www.espn.com/mlb/story/_/id/47214200/mets-... |
| 12/06/25 | Mets claim Red Sox castoff Criswell from waivers. The Mets claimed right-hander Cooper Criswell off waivers from the Red Sox just one day after he was designated for assignment. Source: https://www.espn.com/mlb/story/_/id/47214200/mets-... |
| 12/05/25 | Mets claim Red Sox castoff Criswell from waivers. The Mets claimed right-hander Cooper Criswell off waivers from the Red Sox just one day after he was designated for assignment. Source: https://www.espn.com/mlb/story/_/id/47214200/mets-... |
| 12/05/25 | Mets claim RHP Cooper Criswell off waivers from Red Sox. The Mets have added another piece to the mix in their bullpen, claiming RHP Cooper Criswell off waivers from the Red Sox. Source: https://sny.tv/articles/mets-claim-cooper-criswell... |
| 8/21/25 | Red Sox roster depth takes hit as starting pitcher, infielder placed on Worcester injured list. The Red Sox are down a couple of men at Triple-A Worcester with Cooper Criswell (elbow) and Vaughn Grissom (foot) both being placed on the injured list. Source: https://sports.yahoo.com/article/red-sox-roster-de... |
| 8/02/25 | Red Sox option pitcher as Dustin May joins team. The Boston Red Sox made a key roster decision Saturday morning, optioning right-hander Cooper Criswell to Triple-A Worcester to clear space for Dustin May's debut, which is set for this Wednesday vs. the Kansas City Royals. The move comes just days after Boston acquired the former Los Angeles Dodgers starter in exchange for prospects James Tibbs III and Zach Ehrhard. Criswell's demotion surprised many fans, especially after he delivered a dominant performance just Friday night. The 29-year-old pitched seven innings of one-run ball in a 2-1 walk-off win over the Houston Astros, but was still sent down the following morning. Source: https://clutchpoints.com/mlb/boston-red-sox/red-so... |
| 8/01/25 | Red Sox Cooper Criswell, in first major league start of season, steps in and throws a gem. As a swingman who has been up and down from the minor leagues several times this season, Cooper Criswell's job is to be ready when he's called upon. When the team needs him, it's Criswell's job to provide multiple innings, or, as was the case Friday night, a spot start. With Richard Fitts optioned on the recent road trip and opening a temporary spot in the rotation, Criswell seized the opportunity and turned in what was likely the second-best start of his major league career. Criswell scattered seven hits over seven innings to the Houston Astros, allowing just one run in a game the Sox went on to win, 2-1, in 10 innings. Source: https://www.masslive.com/redsox/2025/08/red-sox-co... |
| 7/29/25 | Red Sox roster moves: Fresh arm called up with Richard Fitts (6.86 ERA since June 2) sent to AAA. In need of a fresh arm after suffering a brutal, rain-delayed walk-off loss to the Twins on Monday night, the Red Sox called up right-hander Cooper Criswell to join the team Tuesday. Criswell takes the roster spot of Monday starter Richard Fitts, who was optioned to Triple-A Worcester after the game. Criswell should be available out of the bullpen Tuesday behind starter Lucas Giolito. On Monday, with Aroldis Chapman (back spasms), Garrett Whitlock (sick from the club's turbulent flight) and Justin Wilson (pitched on back-to-back days) unavailable, manager Alex Cora used five relievers to cover five innings in relief of Fitts, who allowed two runs four hits and walked three batters in four innings. Source: https://www.masslive.com/redsox/2025/07/red-sox-ro... |
| 6/28/25 | Kristian Campbell helps WooSox snap skid against RailRiders in extras. The losing streak is over for Worcester. Nine innings of action weren't enough to declare a winner between the Red Sox and RailRiders on Saturday night. Complete game statistics can be found here. Red Sox starting pitcher Cooper Criswell allowed two earned runs, two walks, five hits, and struck out three over five innings of work. Source: https://www.masslive.com/worcesterredsox/2025/06/k... |
| 5/23/25 | Boston Red Sox roster move: Lefty (1.99 ERA for WooSox) promoted as 27th man. Lefty Cooper Criswell has been called up to be the 27th man on the Red Sox roster for Friday's doubleheader against the Baltimore Orioles. The Red Sox won Game 1, 19-5. The 28-year-old Criswell has pitched well at Triple-A Worcester this season. Criswell appeared in 26 games and made 18 starts for Boston last year, posting a 4.08 ERA. Source: https://www.masslive.com/redsox/2025/05/boston-red... |
| 3/24/25 | Red Sox Provide Health Update On $21M Starter After Concerning Last-Minute Scratch. The Boston Red Sox have had many more health scares for starting pitchers than they would have preferred this spring. Buehler was supposed to start Sunday's game against the Minnesota Twins, but was scratched in favor of Cooper Criswell in the hours before the contest. Any long-term fears were quickly absolved, but the Red Sox also provided a crucial update about Buehler's availability for the first series of the year. After Saturday's game, manager Alex Cora confirmed Buehler was dealing with a stomach virus and will return to the mound on Monday with the goal of making his previously scheduled regular season Red Sox debut on Saturday against the Texas Rangers. Source: https://www.si.com/mlb/red-sox/boston-red-sox-news... |
| 3/23/25 | Why Walker Buehler isn't starting Sunday (and other Red Sox updates). That Cooper Criswell, not Walker Buehler, pitched the Grapefruit League finale for the Red Sox on Sunday, was a bit of an alarming development early Sunday. The Red Sox pushed back Buehler's final start of the spring due to the illness and have him scheduled to throw six innings on a back field at Fenway South on Monday, according to manager Alex Cora. Source: https://www.masslive.com/redsox/2025/03/why-walker... |
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