The move is retroactive to Saturday. Kemp was injured while swinging the bat against San Francisco on Friday night and hasn’t played since. He received a cortisone shot Friday night but it hasn’t helped much.
Mattingly said the team doesn’t think the problem is related to the shoulder surgery Kemp had in the offseason.
“It’s kind of a separate issue,” Mattingly said. “It is that shoulder, though.”
Source: ESPN.com