Angels star Mike Trout remains day to day with a back injury

Mike Trout continued to make progress in his recovery and return from a back injury.

Thursday, angels Athletic coach Mike Frostad said the center fielder began rotation work on Wednesday. This job involves exercises to strengthen his muscles in preparation for eventually swinging a bat.

“Mike is fine,” Frostad said ahead of the Angels’ morning with the Oakland Athletics. “He is progressing as we expected and he is just continuing to follow his program at the moment. Everything is looking good.

There is no timeline for when he will start swinging a bat as his comeback is handled on a day-to-day basis. The Angels also haven’t discussed a rehab mission for Trout.

“He feels good, that’s the best thing right now,” Frostad said. “He came back after that first day [of rotation work] and he’s fine.

Trout will not travel with the team for their road series against the Seattle Mariners. He will continue his program and work at the facilities at Angel Stadium.

Trout hasn’t played since being pulled from the middle of a game against the Houston Astros on July 12 due to back spasms. He was placed on the 10-day disabled list later that week with inflammation of his left rib cage and received a cortisone injection on July 21 to help ease the discomfort and aid the recovery process.

He saw a spine specialist, who said the Angels star had T5 costovertebral dysfunction, which the team announced on July 27. The term injury refers to a joint connected to a rib in the thoracic section of his spine, which became inflamed.

Trout and the team don’t know what caused the injury. He speculated that the rise in swings he made between indoor batting cages and outdoor batting practice was a primary factor — overusing the joint can cause inflammation.

Shohei Ohtani “good”

Shohei Ohtani was in Thursday’s starting lineup, hitting second as the designated hitter.

On Wednesday, Ohtani was taken out before hitting in the seventh inning with a forearm cramp in his right arm that he felt when he grabbed a bat late in the game.

“It’s okay,” Frostad said of Ohtani on Thursday. “It was a precautionary decision last night, and everything was checked and he’s in the line-up today as a DH, so all is well. … There’s very little concern on our end.”

Angels interim manager Phil Nevin plans to give Ohtani a day off before the end of the week.