He played right field and batted second.
The five-time All-Star jammed his shoulder while diving for the ball during Game 3 on Monday.
X-rays were negative, and Hunter said then he thought it was "more a bruise."
But he vowed to play Tuesday, when the Tigers will attempt to avoid elimination and force Game 5 in Oakland.
"Just sore," Hunter told reporters after Monday's game, a 6-3 win for the A's. "I'm going to play, no matter what. It's a long way from the heart, it's not broke. I'm good. Give me some Advil, I'll be all right."
Hunter suffered the injury while making a diving attempt in right field to catch Coco Crisp's leadoff double.
His shoulder heavily wrapped after the game, Hunter said he did not feel a pop but that he had "jarred" his shoulder.
"I think it's more a bruise," Hunter said, according to MLB.com. "We got X-rays, and nothing's torn or anything like that."
Hunter, 38, is 2-for-10 over the first three games of the ALDS. He hit .304 with 17 home runs and 84 RBIs this season, his first with the Tigers.