MILWAUKEE – The Angels’ tattered rotation now has another question mark.

Garrett Richards, who left his last start early because he was dehydrated, has skipped his between-starts bullpen session as the Angels make sure there is nothing else wrong with him.

Richards is scheduled to start Friday against the Tampa Bay Rays, but as of Wednesday afternoon he was questionable.

“We’re going to be cautious,” said Manager Mike Scioscia, whose team is down to four healthy starters in the majors and obviously can’t afford an injury to Richards.

Richards said he’s not hurt, but he acknowledged that something isn’t right. He skipped his throwing session on Wednesday, and will see Angels doctors on Thursday in Southern California.

“I’m still a little fatigued,” he said. “The body is still tired. I’m still trying to bounce back. Everything doesn’t feel as crisp right now.”

Richards complained of cramping during a 33-pitch fourth inning Sunday in Texas, so Scioscia pulled him after 79 pitches. Richards then saw a doctor at the ballpark and was diagnosed with dehydration.

Richards said since then he’s been concentrating on staying hydrated, and the trainers have been giving him extra fluids.

If Richards does not start Friday, the Angels would most likely go with a bullpen game, using some combination of Cory Rasmus, A.J. Achter and Jose Alvarez to get through the early innings.

Matt Shoemaker, who was sent to Triple-A on Sunday because of his struggles in the majors, is not likely to be an option for Friday.

The only way Shoemaker could return to the majors within 10 days of being sent down is if someone goes on the disabled list. Shoemaker is scheduled to start Thursday or Friday for Salt Lake City. If Shoemaker doesn’t pitch Thursday, that could be an ominous sign for Richards.