GLENDALE, Ariz. -- Dodgers starting pitcher Hyun-Jin Ryu was sent to Los Angeles on Sunday to have his injured left shoulder examined by Dr. Neal ElAttrache, and manager Don Mattingly conceded that the left-hander will start the season on the disabled list.
Ryu attempted to play catch Sunday, four days after receiving a cortisone injection for the type of shoulder stiffness that sidelined him twice last year, but the discomfort returned.
Mattingly said Ryu reported immediate improvement from the injection but was barely able to lob the ball during a brief session of catch.
"It wasn't what we really wanted," Mattingly said. "It wasn't bad, but I think he was feeling something and we want to know more because we're moving toward a heavy workload. I didn't see him throw, but I saw him in [the trainer's room] and saw the look on his face."
In one week's time, the Dodgers will have started non-roster pitchers Chris Anderson, David Huff, Chad Gaudin and Erik Bedard. Mattingly said starting pitchers sent down earlier -- specifically Zach Lee, Carlos Frias, Mike Bolsinger and Joe Wieland -- are more likely options to replace Ryu as they have had their pitch counts stretched out in Minor League games. Those four also are already on the 40-man roster.
Ryu complained of stiffness after his last start against Texas on Tuesday, when he was charged with three error-assisted runs in three innings, but his velocity barely reached 90 mph.
Last year he was on the disabled list from April 28-May 21 with left shoulder inflammation. He also didn't pitch after a Sept. 12 start through the end of the regular season with the same ailment, but he returned to allow one run in six innings in a postseason start.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.