GLENDALE, Ariz. -- Dodgers pitcher Zack Greinke threw off a mound Wednesday for the first time since suffering a mild right calf strain six days earlier in his first Spring Training start.
Greinke threw for about five minutes off the mound, then tossed a few breaking balls on flat ground. The right-hander was unavailable for comment after the workout. Manager Don Mattingly said the session went well and the right-hander will throw off a mound again Thursday.
Mattingly has said that Greinke needs to throw a full bullpen session before he can return to game action. Because of the club's shortened Spring Training schedule, Greinke is virtually eliminated from consideration to pitch in the Opening Series in Sydney, Australia, from March 22-23.
The Dodgers leave for that trip March 16.
The Dodgers will choose two starters from Clayton Kershaw, Hyun-Jin Ryu and Dan Haren for the two Australia games against the D-backs.
Ryu appears primed to pitch in Opening Series
GOODYEAR, Ariz. -- Don Mattingly won't say so, but all signs point to Clayton Kershaw and Hyun-Jin Ryu starting the Dodgers' two games in Australia this month.
After becoming the first Dodger to pitch four innings on Wednesday night (nobody else has gone even three), Ryu said he will be ready to face Arizona Down Under.
"I threw 55 pitches tonight and 75 next time, so in three weeks I'll be ready if called upon," Ryu said.
Ryu said he was looking forward to seeing former Korean teammate Dae-Sung Koo, who taught Ryu how to throw a changeup and will play for the Australian National Team in exhibitions against the Dodgers and D-backs.
Ryu got the win over the Reds behind a grand slam from Cuban second baseman Alex Guerrero and a solo shot from Adrian Gonzalez.
Mattingly said Guerrero is starting to look like a player that would receive a $28 million contract instead of a player rusty from sitting out all of 2013 before defecting.
"He looks more comfortable," said Mattingly. "He looks more fluid. He was stiff early on. He looked typical for a guy who hadn't played in a while. For me, early on was really rough and stiff. He's gotten better. We'll just try to keep playing him as much as we can, but we've got to see other people, too."
Puig OK following exit with sore back
GOODYEAR, Ariz. -- Dodgers right fielder Yasiel Puig was removed from Wednesday night's 10-3 win over the Reds with "upper back soreness" but said he expects to play on Thursday.
Puig received treatment after exiting the game and also iced both shoulders. He said his back felt better after treatment and the shoulders were not an issue.
Puig was scheduled to play six innings but left in the fifth after striking out and grounding out. He later said the discomfort was in his upper back near the left shoulder blade.
Manager Don Mattingly said trainer Stan Conte believed Puig would be able to play Thursday against the Angels in Tempe.
"I don't try to figure out Yasiel," said Mattingly. "He's had shoulder, different things. I'm not too concerned as long as tomorrow he can play."
Mike Baxter replaced Puig in right field and went 2-for-3 with a run scored.
Dodgers set for first game with new replay system
GLENDALE, Ariz. -- The Dodgers get their first game with the expanded instant-replay rules on Thursday when they play the Angels in Tempe.
The Dodgers have five Cactus League games in which replay will be used: March 11 vs. the Royals, March 12 vs. the D-backs, March 15 vs. the White Sox and March 16 vs. the Rockies.
The system will be in place for all three Freeway Series exhibition games against the Angels, but not in Australia for the two regular-season games in the Opening Series against the D-backs.
Manager Don Mattingly said video coordinator John Pratt will serve as the video specialist in the clubhouse in communication with the dugout for replay challenges on Thursday. The club has not named the person who will be in that role for the regular season.
Stripling's Tommy John surgery delayed
GLENDALE, Ariz. -- Ross Stripling must have done extra damage pitching with a torn right elbow ligament, because on Wednesday, he underwent arthroscopic surgery to clean out loose bodies from an inflamed elbow, delaying his planned Tommy John surgery.
Dr. Neal ElAttrache performed the unexpected procedure, and the Dodgers said the surgery will take place after Stripling's inflammation has subsided and his range of motion returns.
Stripling said he suffered the ligament tear throwing batting practice Feb. 23, but he didn't tell anybody. He then pitched one inning Feb. 26 and threw with normal velocity, but he reported pain afterward. An MRI revealed the torn ligament.
Stripling is ranked as the No. 10 prospect in the organization by MLB.com, while the Dodgers considered him right behind Zach Lee among Minor League pitchers who were on track to make their Major League debuts this year.
Stripling was a fifth-round pick in 2012 out of Texas A&M and split time last year between Class A Rancho Cucamonga and Double-A Chattanooga for a combined 8-4 mark with a 2.82 ERA.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.