Mike Napoli is dealing with plantar fasciitis in his left foot.
The plantar fascia is a thick fibrous band of tissue that starts at the heel bone and extends along the sole of the foot toward the toes.
Napoli said the condition first flared on him when the team was in Anaheim the weekend of July 5-7.
"I got to play a couple of innings here and there the past week, and it's felt all right," Napoli said. "The reason why I got the injection was because I was at a point where it was bothering me pretty good. I'm going to go into treatment for every day, like I've been, and try to take care of it as best as I possibly can.
"I'm just going to have to grind through it and play through some pain -- which I have been already."
Via Gordon Edes/ESPN