Dodgers catcher Yasmani Grandal will undergo further tests on his right forearm, but expects to play Thursday. (Associated Press photo)

Prior to Andre Ethier breaking his tibia Friday, the Dodgers had more reason to worry about the health of their pitching staff.

President of baseball operations Andrew Friedman acknowledged Tuesday that he “can’t imagine” right-hander Mike Bolsinger will recover in time from an injury to his abdominal/oblique area in time to open the season as the Dodgers’ fifth starter.

“I’m pretty it definitely will affect the start of the regular season,” Friedman said. “As far as how deep into it, I’m not sure.”

Right-hander Brandon Beachy, also a candidate to begin the season as the Dodgers’ fifth starter, has been set back by pain in his right elbow. He’s scheduled to resume throwing Wednesday, Roberts said.

Meanwhile, the Dodgers ordered further tests on catcher Yasmani Grandal’s sore right forearm.

“One day he feels great,” Dodgers manager Dave Roberts said. “The next day he doesn’t feel good, and not well enough to finish a game. It’s a little disconcerting, but he wants to play and get his at-bats.”

Grandal said he’s scheduled to play Thursday against the Cleveland Indians and will limit his activity in the meantime.