Kemp was injured when he slammed into the center-field fence on Tuesday night at Coors Field. He also sustained a chin gash that required several stitches to close. Kemp suffered the injuries when he crashed face-first into the Plexiglas trying to catch a triple hit by Josh Rutledge in an 8-4 loss to the Rockies.
"With that kind of hit, I expect he'll be out tomorrow for sure," manager Don Mattingly said after the game.
Kemp was sprawled on the warning track for several minutes but did not lose consciousness, Mattingly said.
"He was talking fine -- 'Just give me a second,'" Mattingly quoted Kemp as saying. "He was actually funny -- 'I'm not coming out of this game, I'm not coming out of this game.'"
And for two batters, he didn't. The first one was Jordan Pacheco's blooper for which Kemp made a futile dive. The next was Wilin Rosario's single up the middle, and after Kemp returned the ball to the infield, he returned himself to the dugout.
"That's when he felt the knee," Mattingly said of the dive on Pacheco's ball. "It looked like he was laboring on the ball."
Replays showed Kemp's jaw slammed into his right arm, which he got up against the Plexiglas at the time of impact. The padding stops where the Plexiglas starts, which is about neck-high on Kemp.
"It was scary," said pitcher Chris Capuano. "He goes out and plays hard with no regard for his body. You like that as a pitcher, but your heart sinks when he hits the wall that hard and you hope he's all right."
Kemp was immediately tended to by trainer Sue Falsone and assistant trainer Greg Harrel. He remained flattened on the warning track for several minutes, with Harrel treating the cut on Kemp's chin.
On Monday night, Kemp slammed into the screened fence in front of the Dodgers' center-field bullpen trying to catch Tyler Colvin's triple, but after flexing his right hand remained in the game.
Kemp has already missed 51 games this year with two stints on the disabled list for a strained left hamstring.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.