"He was added to the 40-man roster in the middle of May but designated for assignment just over a week later. He was claimed by the Guardians but they kept him on optional assignment for the rest of the year, so he never pitched for that club at the big league level. He was outrighted off the 40-man roster at season's end."
"Going back to 2023, his first year as a primary reliever, he has thrown 125 2/3 Triple-A innings with a 2.94 ERA. His 16.7% walk rate in that time is way too high but he also punched out 32% of batters faced. That includes 48 innings in 2025 with a 3.19 ERA, 29.8% strikeout rate, 15.6% walk rate and 65.1% ground ball rate."
The Athletics signed left-hander Krook to a minor-league contract and assigned him to Triple-A Las Vegas, with an expected invite to major-league camp. Krook, 31, previously signed a similar pact with the A's, was briefly added to the 40-man roster, designated for assignment, claimed by the Guardians and later outrighted, enabling him to elect free agency. Krook's major-league experience spans eight games across three seasons with a 16.20 ERA. His Triple-A record since 2023 includes 125 2/3 innings with a 2.94 ERA, a 32% strikeout rate and a high 16.7% walk rate; he relies on pitch movement rather than velocity. The A's currently have two lefty relievers on the 40-man roster, with Krook joining the non-roster options.
Read at MLB Trade Rumors
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