Colletti criticized Kemp's play during a radio interview with KABC on Tuesday.
"That's just old news to me. I'm going to go out here, get ready for my day, ready to play a baseball game," said Kemp. "Everybody has their own opinions."
Kemp said he's been getting himself out at the plate, but stressed it was not time for him or the team, in last place in the NL West, to panic.
Kemp hit two home runs on the Dodgers' nine-game road trip, but hit just .242. On the season, Kemp is batting .292 with team highs in home runs (seven) and RBIs (20).
"How many games we got left, about 140, huh?" Kemp asked, rhetorically. "How many games are we behind? So we got 140 games to make up five games. Wow, that's very possible. Very very possible."