Devin Sweet

The Mariners announced a few roster moves prior to tonight’s game, selecting the contract of right-hander Devin Sweet and recalling fellow righty Prelander Berroa, with both players set to make their respective major league debuts as soon as they get into a game. In corresponding moves, right-handers Ty Adcock and Isaiah Campbell were optioned to Double-A Arkansas. The club already had a 40-man vacancy and won’t need to make a corresponding move in that regard.

Berroa, 23, came over the Mariners last year in a trade that sent Donovan Walton to the Giants. Berroa finished last year with a combined 2.86 earned run average across those two systems and different minor league levels, tossing 100 2/3 innings. The M’s liked him enough to give him a 40-man roster spot in November in order to protect him from being selected in the Rule 5 draft.

He started this year in the Double-A rotation but had a 5.16 ERA through his first five starts. He was moved to the bullpen at that point in a move that seems to have worked out quite well. He’s thrown 23 1/3 innings over 19 appearances since taking on a relief role, posting a 0.77 ERA in that time. His 13.5% walk rate is certainly on the high side but he’s limiting damage by striking out 39.3% of batters faced. He won’t be able to sustain a .238 batting average on balls in play or 90.9% strand rate but the results are nonetheless encouraging enough to earn him a big league look. He’s currently considered the club’s #10 prospect at Baseball America and #11 at FanGraphs.

Sweet, 26, cracks a 40-man roster for the first time in his career. An undrafted free agent who signed with the Mariners in 2018, he’s been climbing the minor league ladder since then. He’s spent all of this year in Double-A, posting a 1.54 ERA in 35 innings over 27 appearances. He’s struck out 34.6% of opponents while walking just 5.9%. He’s ranked the club’s #26 prospect by BA and #29 at FanGraphs.

The Mariners suffered a rough 10-3 loss at the hands of the Twins last night, with Bryan Woo allowing six earned runs and getting bounced in the fourth inning. Each of Adcock, Campbell and Tayler Saucedo tossed 29 pitches or more, while many of the high-leverage hurlers appeared in close games on both Monday and Sunday. With a fairly taxed relief corps, these moves give the club an injection of fresh arms.