He slid safely into second base, but lost contact with the bag as he popped up and was tagged by shortstop Troy Tulowitzki, who took the throw from center fielder Drew Stubbs.
"That's one thing I don't like about replay," said Dodgers manager Don Mattingly, who otherwise has been a supporter of the change. "He's basically safe, he just stands up, one foot changes to the other and they keep the tag on. It's a technicality. If he slides and comes off the base, that's different."
Kemp was given a single on the play.
Ken Gurnick is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.