The New York Yankees placed reliever Keynan Middleton on the 15-day injured list Wednesday.
Middleton, 29, has inflammation in his right shoulder and his designation is retroactive to Sunday.
The Yankees acquired the right-hander in a trade with the Chicago White Sox on Aug. 1.
Middleton is 2-2 with a 3.08 ERA (0.68 ERA with the Yankees) and two saves in 50 bullpen appearances this season.
New York recalled left-hander Matt Krook from Triple-A Scranton/Wilkes-Barre in a corresponding move.
Krook, 28, made his major league debut on June 16 and allowed seven runs across three innings in two games.
–Field Level Media