Cooper Criswell - MLB News, Rumors, & Updates

Newest Mariners pitcher is a textbook example of a mop-up guy New trade acquisition Cooper Criswell is set to be a mop-up guy but doesn't offer much else to the Mariners.

JANUARY 28 • SODOMOJO.COM

Mariners acquire swingman Cooper Criswell in trade with Mets The Seattle Mariners have yet to make a blockbuster deal on the back end of the offseason, but they've certainly added a lot of depth headin...

JANUARY 24 • SI.COM

Mariners trade for swingman Criswell to boost pitching depth The Mariners added to their pitching depth on Friday, acquiring right-handed swingman Cooper Criswell from the Mets for cash. Criswell, 29,...

JANUARY 24 • MLB.COM

Mariners acquire right-hander Cooper Criswell from Mets for cash

The Seattle Mariners acquired right-hander Cooper Criswell from the New York Mets on Friday for cash, and designated left-hander Jhonathan Diaz for assignment

JANUARY 24 • Associated Press

Bound for Seattle The Mets traded Criswell to the Mariners on Friday in exchange for cash, Jorge Castillo of ESPN.com reports.

Impact The 29-year-old was DFA'd by the Mets on Wednesday following the team's acquisition of Freddy Peralta and Tobias Myers, but Criswell will recapture a 40-man spot upon moving to Seattle. He posted a 3.57 ERA and 1.58 WHIP in 17.2 regular-season innings with the Red Sox in 2025 and will compete for a spot in the Mariners' bullpen during spring training.

JANUARY 23 • ROTOWIRE

DFA'd by Mets The Mets designated Criswell for assignment Wednesday, Anthony DiComo of MLB.com reports.

Impact Criswell will end up as the roster casualty necessary to create space on the Mets' 40-man following the acquisition of Freddy Peralta and Tobias Myers from Milwaukee on Wednesday. Criswell made seven regular-season appearances with the Red Sox last year, during which he logged a 3.57 ERA and 1.58 WHIP across 17.2 innings. If he passes through waivers unclaimed, he will likely spend the majority of 2026 at Triple-A Syracuse with a chance to make an occasional appearance in the majors.

JANUARY 22 • ROTOWIRE

Mets acquire ace pitcher Freddy Peralta from Brewers in trade

The active New York Mets have acquired ace pitcher Freddy Peralta and right-hander Tobias Myers from Milwaukee in a trade that sent two top prospects to the Brewers: pitcher Brando...

JANUARY 22 • Associated Press

Mets Swoop In To Claim DFA'd Red Sox Right-Hander Less than 24 hours after he was designated for assignment by the Boston Red Sox, Cooper Criswell was snatched up by the Mets.

DECEMBER 5, 2025 • NESN.COM

Claimed off waivers by Mets The Mets claimed Criswell off waivers from the Red Sox on Friday, Jorge Castillo of ESPN.com reports.

Impact Criswell had been designated for assignment following Boston's five-player trade with Pittsburgh on Thursday. The 29-year-old has been a useful swingman for the Red Sox the last two seasons, holding a 4.00 ERA and 82:36 K:BB over 117 innings covering 19 starts and 14 relief appearances. Criswell does not have minor-league options remaining but is not yet arbitration-eligible, so the Mets will have several years of control of the righty.

DECEMBER 5, 2025 • ROTOWIRE

Red Sox Acquire RHP Johan Oviedo from Pirates in 5-Player Trade

The Boston Red Sox have acquired right-hander Johan Oviedo from the Pittsburgh Pirates as part of a five-player trade.

DECEMBER 5, 2025 • FOX SPORTS

Red Sox Acquire RHP Johan Oviedo from Pirates in 5-Player Trade

Designated for assignment The Red Sox designated Criswell for assignment Thursday, Chris Cotillo of MassLive.com reports.

Impact The Red Sox re-signed Criswell to a one-year contract in early November, but he'll lose his roster spot less than one month later. He spent the majority of the 2025 season with Triple-A Worcester and should have the chance to contribute as a reliever at some point in 2026 if he sticks with the organization.

DECEMBER 5, 2025 • ROTOWIRE

Re-signs with BoSox Criswell signed a one-year, $800,000 contract with the Red Sox on Thursday, Robert Murray of FanSided.com reports.

Impact Criswell appeared in seven games for Boston in 2025, finishing the regular season with a 3.57 ERA and 1.58 WHIP through 17.2 innings. He put up similar numbers at Triple-A Worcester (3.70 ERA, 1.35 WHIP) before elbow inflammation put an early end to his season in late August. The 29-year-old righty doesn't have any more minor-league options remaining, so he will have to make the Red Sox's Opening Day roster to avoid losing his 40-man spot.

NOVEMBER 6, 2025 • ROTOWIRE

Placed on IL at Triple-A Criswell was placed on the 7-day injured list by Triple-A Worcester on Wednesday due to right elbow inflammation, Chris Cotillo of MassLive.com reports.

Impact Criswell has spent most of the 2025 season at Triple-A but has appeared in seven games (one start) with the Red Sox, logging a 3.57 ERA, 1.59 WHIP and 9:5 K:BB across 17.2 innings of work. He owns a 4-2 record, 3.70 ERA, 1.34 WHIP and 68:28 K:BB across 65.2 innings at Triple-A.

AUGUST 21, 2025 • ROTOWIRE

Placed on IL at Triple-A Criswell was placed on the 7-day injured list by Triple-A Worcester on Wednesday due to right elbow inflammation, Chris Cotillo of MassLive.com reports.

AUGUST 21, 2025 • ROTOWIRE

Dispatched to Triple-A The Red Sox optioned Criswell to Triple-A Worcester on Saturday.

Impact Criswell fired seven innings of one-run ball Friday against the Astros, but he'll end up as the roster casualty necessary to make room for Dustin May in Boston's rotation. Criswell sports a 3.57 ERA through 17.2 innings with the Red Sox this season and would likely be the next man up if any of Boston's starters need to miss time down the stretch.

AUGUST 2, 2025 • ROTOWIRE

Goes seven strong in spot start Criswell did not factor into the decision in Friday's 2-1 extra-inning win over the Astros, allowing one run on seven hits and two walks with four strikeouts over seven innings.

Impact Criswell allowed just a solo homer in the second inning and otherwise kept the Astros in check, needing only 84 pitches to complete seven strong frames in his first start and seventh major-league appearance of the season. The 29-year-old now owns a 3.57 ERA, 1.58 WHIP and 9:5 K:BB across 17.2 innings with the Red Sox, though Friday's outing was likely just a spot start with Dustin May in line to take the fifth spot in the team's rotation.

AUGUST 2, 2025 • ROTOWIRE

Starting Friday vs. Astros Criswell will start Friday's game against the Astros, Chris Cotillo of MassLive.com reports.

Impact The right-hander was called up from Triple-A Worcester on Tuesday and will step into Boston's rotation to fill the spot vacated by Richard Fitts' demotion earlier this week. Criswell, who's worked out of the bullpen in each of his six MLB appearances this year, has a 5.06 ERA, 1.78 WHIP and 5:3 K:BB over 10.2 innings. It may only be a spot start for the 29-year-old since trade-acquisition Dustin May is scheduled to make his Red Sox debut Sunday.

AUGUST 1, 2025 • ROTOWIRE

Receives promotion The Red Sox recalled Criswell from Triple-A Worcester on Tuesday, Chris Cotillo of MassLive.com reports.

Impact Criswell will provide some much-needed length in the Boston bullpen after starter Richard Fitts lasted only four innings in Monday's loss to the Twins before being optioned to Triple-A in a corresponding move. The 29-year-old righty has made six relief appearances with the Red Sox in 2025, allowing nine runs (six earned) with a 5:3 K:BB over 10.2 frames. Criswell had been starting at Triple-A could be a candidate to enter the rotation the next time Fitts' turn in the rotation comes up during this weekend's series versus the Astros.

JULY 29, 2025 • ROTOWIRE

Slated for promotion The Red Sox will recall Criswell from Triple-A Worcester prior to Tuesday's game in Minnesota, Tim Healey of The Boston Globe reports.

Impact Criswell will provide some much-needed length in the Boston bullpen after Richard Fitts lasted only four innings in Monday's loss to the Twins. The veteran righty has made six relief appearances with the Red Sox in 2025, allowing nine runs (six earned) with a 5:3 K:BB over 10.2 frames.

JULY 29, 2025 • ROTOWIRE

Returns to Triple-A The Red Sox optioned Criswell to Triple-A Worcester on Thursday.

Impact Criswell will return to Worcester after he was called up to serve as the Red Sox's 27th man for Wednesday's doubleheader with the Reds. He was expected to work in bulk relief in the second game of the twin bill, but the Red Sox used five other pitchers in their 8-4 win in the nightcap before Criswell was called upon to record the final five outs. He kept the Reds off the board and gave up two hits, bringing his ERA and WHIP to 5.06 and 1.78, respectively, through 10.2 innings with the big club.

JULY 3, 2025 • ROTOWIRE

Serving as bulk reliever The Red Sox recalled Criswell from Triple-A Worcester on Wednesday, Jen McCaffrey of The Athletic reports.

Impact Criswell will serve in a bulk relief role behind opener Brennan Bernardino in Wednesday's game versus the Reds. The right-hander went five innings and threw 87 pitches Saturday for Worcester, so he won't have a normal starter's workload Wednesday while pitching on short rest.

JULY 2, 2025 • ROTOWIRE

Expected to be 27th man Wednesday Red Sox manager Alex Cora said that Criswell will likely be recalled from Triple-A Worcester to start Wednesday's game versus the Reds following the completion of a suspended game,...

Impact Brayan Bello had been scheduled to start the the regularly scheduled contest, but he will be handed the ball in the earlier suspended game instead. That leaves Criswell -- who will added as the 27th man -- to start the nightcap, although it's possible an opener is used ahead of him. Criswell would be pitching on three days' rest after going five innings and throwing 87 pitches Saturday for Worcester, so he'd likely have a truncated workload against Cincinnati.

JULY 2, 2025 • ROTOWIRE

Shuttled back to Worchester Criswell was optioned to Triple-A Worcester on Saturday.

Impact Criswell has bounced back and forth between Boston and Worcester this season and made two appearances during his most recent stint in the majors. He threw three innings Friday against the Yankees, so the Red Sox will option him and get a fresh arm for their bullpen.

JUNE 7, 2025 • ROTOWIRE

Red Sox rally, then rally again for 11-9 win over Angels on Rafaela's walk-off homer

Ceddanne Rafaela curled a home run around the Pesky Pole in the bottom of the ninth inning and the Boston Red Sox rallied after trailing four different times to beat the Los Angele...

JUNE 4, 2025 • Associated Press

Back in big leagues The Red Sox recalled Criswell from Triple-A Worcester on Tuesday, Gabrielle Starr of the Boston Herald reports.

Impact The Red Sox need some length in their bullpen after Richard Fitts recorded just three outs Monday against the Angels. Criswell has been rocked for eight runs (five earned) over 4.1 innings during his time with Boston this season but has collected a 1.52 ERA while being used primarily as a starter at Worcester.

JUNE 3, 2025 • ROTOWIRE

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Mariners acquire right-hander Cooper Criswell from Mets for cash

Mets acquire ace pitcher Freddy Peralta from Brewers in trade

Red Sox Acquire RHP Johan Oviedo from Pirates in 5-Player Trade

Red Sox rally, then rally again for 11-9 win over Angels on Rafaela's walk-off homer