Cincinnati Reds manager Dusty Baker remained in a Chicago hospital Thursday to have more tests for an irregular heartbeat, MLB.com reported.
Baker did not attend Thursday's game against the Cubs, and bench coach Chris Speier acted as the Reds manager for the second straight game.
"He's in doing another test. We should get results on that fairly shortly," Speier told reporters before Thursday's game. "It all looks good. I think the plan is to probably wait to see what the results of that test are."
According to the Reds media relations department, Baker told Reds general manager Walt Jocketty that he was feeling pretty good.
Baker, 63, is scheduled to be monitored at the hospital throughout Thursday, then return to Cincinnati on Friday.
It has not been determined whether Baker will manage Friday's game against the Dodgers.
Baker left the ballpark about two hours before Wednesday's game time to get a chest X-ray after the symptoms arose. He has not been back to the ballpark since.
Baker managed the 3,000th game of his career on Tuesday and is second in wins among active managers.