Krook was optioned to Triple-A Scranton/Wilkes-Barre on Sunday.
Krook's contract was selected by the Yankees in November, but he was unable to secure a spot in the major-league bullpen to begin the regular season. Over six Grapefruit League appearances this spring, he posted a 3.75 ERA and 1.33 WHIP in 12 innings. The southpaw hasn't yet made his big-league debut, but it wouldn't be surprising to see him do so at some point in 2023.