Mayza clutched his pitching arm and covered his face with his right hand as concerned teammates gathered around him at the mound. He left the field with a team trainer.
Friday's game marked Mayza's team-high 68th appearance of the year, tied for fourth most in the American League, though he has had at least two days off after his previous four appearances. He is 1-3 with a 4.91 ERA.
Information from The Associated Press was used in this report.