The Rays placed outfielder Desmond Jennings on the 15-day disabled list on Saturday with a left knee contusion and activated outfielder Mikie Mahtook from the DL.
Jennings fouled a ball off his left knee on Tuesday and had been out of the lineup since. The 29-year-old is batting .200 with seven home runs and 20 RBIs in 65 games this season.
Mahtook has been out since June 20, when he fractured his left hand on a hit-by-pitch. The 26-year-old, in his second Major League season, played in 24 games for the Rays before the injury, batting .