"He's doing OK," said Cora. "Just, for me, it didn't make sense to send him out there the way he was feeling. He should be back tomorrow."
That's bad news for the Orioles, who probably wish Martinez would stay home and eat chicken soup.
Thursday marked the fourth time Martinez has homered in the last five games, and eighth in the last 15.
The designated hitter/outfielder now has 13 home runs for the season, which briefly tied him with seven other players -- including teammate Mookie Betts -- for most in the Majors until Manny Machado took Price deep in the ninth inning for his 14th.
The homer was Martinez's 44th since the All-Star break of last season, snapping a tie with Giancarlo Stanton for most in the Majors over that time.
"He launches balls on a daily basis," Xander Bogaerts said of Martinez. "That's routine for him."
Martinez also extended his career-best on-base streak to 22 games, during which he's slashing .393/.463/.774.