The Rays are going to acquire right-hander Casey Legumina from the Mariners, reports Ken Rosenthal of The Athletic. The Mariners, who designated Legumina for assignment last week, will receive minor leaguer Ty Cummings in return, per Marc Topkin of the Tampa Bay Times. Tampa has a full 40-man roster and will need to make a corresponding move to make the deal official. Legumina is also out of options and will need an active roster spot when he reports to the team.
Legumina, 29 in June, is in his fourth major league season. He got limited looks with the Reds in 2023 and 2024. He was designated for assignment before the 2025 season and flipped to the Mariners. Seattle gave him a decent amount of time in the big leagues last year but he didn’t do much with the opportunity. He tossed 49 2/3 innings, allowing 5.62 earned runs per nine. His 25.1% strikeout rate was pretty good but he also gave out walks at a high clip of 11.4%.
As he struggled to produce decent results, the Mariners optioned him to the minors a few times. That burned his final option and left him out of options here in 2026. He held his roster spot to begin the year but couldn’t turn a corner. In 11 2/3 innings, his 4.63 ERA was an improvement compared to last year but with less impressive underlying numbers. He showed better control by only walking 5.7% of opponents but also saw his strikeout rate drop to 17%.
Maintaining that ERA was going to be tough, as a big factor is that he hasn’t allowed a home run yet. Also, his velocity is noticeably down. His four-seamer averaged 94.3 miles per hour last year but is down to 93.5 so far this year. His sinker has gone from 93.8 to 93 mph while his slider has dropped from 81.1 to 79.7 mph.
That got him bumped off the Seattle roster but the Rays will take a shot on him. Tampa is out to a strong 13-11 start but it’s no thanks to their bullpen. Their relief pitchers have a collective 5.64 ERA, worse than every team in the majors apart from the Astros and Royals. Injuries have taken a toll on the depth. They lost Manuel Rodríguez to Tommy John surgery last year. Both Steven Wilson and Edwin Uceta began the season on the injured list due to spring injuries. Since the regular season started, they have lost Garrett Cleavinger and Mason Englert to the IL.
The healthy guys haven’t stepped up. Yoendrys Gómez, Ian Seymour and Griffin Jax have each thrown at least nine innings and no one in that trio has an ERA below 7.00. Bryan Baker, Hunter Bigge, Kevin Kelly and Cole Sulser have been a bit better but each member of that quarter has an ERA above 4.00. There’s room in there for Legumina to earn some innings, especially if he can regain some of last year’s strikeouts and velocity.
To get Legumina on their big league club, the Rays are subtracting from their farm system. Cummings, now 24, was acquired as the player to be named later in the 2024 trade which sent Randy Arozarena to Seattle. Now the Mariners get Cummings back a little over a year later.
The right-hander has mostly worked as a starter in his minor league career. Prior to the first trade, he tossed 116 1/3 High-A innings in 2024 with a 4.17 ERA, 24.7% strikeout rate, 9.2% walk rate and 50.3% ground ball rate. In 2025, he pitched in Double-A and Triple-A, logging 123 innings. His ERA improved to 3.29 but with a reduced 17.6% strikeout rate and 47.1% ground ball rate. So far in 2026, he’s been pitching in relief in Double-A. He tossed 5 1/3 innings over three appearances with a 1.69 ERA, 33.3% strikeout rate, 5.6% walk rate and 45.5% ground ball rate.
Perhaps the Mariners are intrigued by that recent bullpen move or maybe they will want to stretch him back out. Either way, they are probably happy to get back a guy they drafted, while giving up a guy they had already cut from their roster. Cummings will be eligible for the Rule 5 draft this December if not added to the 40-man roster.
Photo courtesy of David Frerker, Imagn Images
