Detroit Tigers left-hander Daniel Norris disclosed Monday that he kept pitching after learning he had a cancerous growth on his thyroid.
Norris, 22, said he was told by a doctor that surgery could wait until the end of the season.
"It's time to get this thing out," Norris said.
Norris was traded from Toronto to Detroit in late July in the deal that sent David Price to the Blue Jays.
Al Avila, the Tigers' general manager, says the club knew about Norris' condition when they acquired him and expect him to recover in full.
Barry Zito calls it a career