Cubs put Nico Hoerner, Jake Arrieta and Dan Winkler on 10-day injured list

The Cubs made a flurry of roster moves Tuesday, putting infielder Nico Hoerner (strained left forearm) and right-handers Jake Arrieta (scrape on right thumb) and Dan Winkler (tendinitis in right triceps) on the 10-day injured list and recalling left-hander Kyle Ryan, right-hander Keegan Thompson and infielder Ildemaro Vargas from Triple-A Iowa.

‘‘We’re optimistic about everyone,’’ manager David Ross said before the opener of a doubleheader against the Dodgers. ‘‘I don’t think they’re very serious [injuries].’’

Hoerner’s IL stint comes after his collision with outfielder Ian Happ in the Cubs’ loss Sunday to the Reds. Hoerner said before the doubleheader that he had some soreness after the game Sunday, but nothing too severe. It was a bit worse Monday, however, leading to the Cubs’ decision to put him on the IL.

‘‘I was pretty stressed in the outfield, just not knowing what condition [Happ] was in,’’ Hoerner said. ‘‘Pretty shaken up. Just seeing a friend leave the field [on a cart] like that doesn’t feel good at all. So when I could go back to the locker room and see him and he was in good spirits, that definitely made me feel good because it was probably the scariest baseball play I’ve been a part of.’’

It appeared Happ took the worst of the collision, but he has come away from it better than many expected. He still is undergoing tests but has cleared the Cubs’ concussion protocols.

‘‘Tests seem to be all good,’’ Ross said. ‘‘He’s pretty sore in a lot of different areas. He ran through a ton of tests to make sure he was fine, and I think all the tests I know have come back. He’s in a good place.’’

Hendricks goes all the way in Game 1

Things didn’t go well for right-hander Kyle Hendricks in April, as his 7.54 ERA indicated. But in his first start in May, he looked like the ace the Cubs need him to be. He tossed a seven-inning complete game in the Cubs’ 7-1 victory in Game 1.

Hendricks went to work after the Cubs took a commanding first-inning lead and held a tough Dodgers lineup in check. He allowed one run and seven hits, struck out six and walked one.

‘‘I did a much better job intent-wise,’’ Hendricks said after the game. ‘‘Going pitch-to-pitch. [Catcher Willson Contreras] had me locked in on that. The boys going out and putting up four runs early was huge to help me have that confidence to go attack, which I’ve been trying to do better.’’

It was the first time this season a Cubs starter had pitched seven innings.

‘‘I think Kyle looked a lot more like himself from the jump,’’ Ross said.

MLB suspends Garrett, fines Baez

Major League Baseball suspended Reds reliever Amir Garrett for seven games for inciting a benches-clearing altercation during the game Saturday against the Cubs.

Cubs shortstop Javy Baez was fined an undisclosed amount for his role in the incident.