The move comes just as the Dodgers are about to get ace Clayton Kershaw back after he missed a little more than a month with a strained muscle near his left shoulder. Dodgers manager Don Mattingly told reporters in Miami the injury to Ryu did not appear to be serious and that no further diagnostic tests were planned.
Ryu felt something during Sunday's start against the Colorado Rockies, when he allowed five earned runs on nine hits in five innings. The team, which played a day-night doubleheader with one game going 12 innings Thursday, also optioned reliever Paco Rodriguez to Triple-A Albuquerque and recalled utility man Chone Figgins and reliever Jose Dominguez.
Ryu, who finished fourth in Rookie of the Year voting last year, was 3-2 with a 3.00 ERA. He was scheduled to pitch Sunday in Miami and the team will have to recall a pitcher from Triple-A, perhaps Stephen Fife, to fill his rotation spot.
Mattingly said Kershaw likely will come off the disabled list to pitch Tuesday's game in Washington.
Dominguez has pitched in four games at Albuquerque, allowing only one earned run in five innings (1.80 ERA).