The Mariners announced that they have selected the contract of left-hander Jhonathan Díaz from Triple-A Tacoma, then optioned him to Tacoma. Ryan Divish of The Seattle Times relays on X that the lefty had an opt-out in his minor league deal, which is why he got added to the 40-man but not the active roster. They had an open 40-man spot and thus didn’t need to make a corresponding move.
Díaz, 27, signed a minor league deal with the M’s in January. He has since made nine appearances for Tacoma, eight starts, logging 51 innings with a 3.18 earned run average. He has struck out 26.2% of batters faced while giving out walks just 4.3% of the time. He has also kept 56.3% of balls in play on the ground. The fact that all that took place in the hitter-friendly Pacific Coast League makes it all the more impressive.
The lefty also has 35 1/3 innings of major league experience, which came with the Angels from 2021 to 2023. He had a 4.48 ERA in that time, though with his strikeout and walk rates matching at an unimpressive 14.4% level. He tossed 210 1/3 minor league innings over that same period of time with a 4.45 ERA, 24% strikeout rate and 9.2% walk rate.
The Mariners are clearly intrigued by the recent form Díaz has shown and didn’t want him to get away. He still has options and they had an open spot on the 40-man, they were able to simply add him there and keep him in Tacoma, preventing him from returning to the open market.
The M’s have a strong rotation right now composed of Luis Castillo, George Kirby, Logan Gilbert, Bryan Woo and Bryce Miller. On optional assignment, they have Emerson Hancock and Levi Stoudt as depth options, with Díaz now joining them as guys who could be recalled for a spot start or as an injury replacement.