Kemp went a perfect 4 for 4, with three RBI's and two double on Tuesday night.
Zack Greinke (15-3) pitched brilliantly and allowed two runs on six hits in six innings of work.
"It feels good to just be able to be here with the team and be able to go out there and run out with them and compete with them and do all that, " Kemp said. "I missed baseball, man."
Kemp started off hot, when he doubled deep to left that scored Hanley Ramirez and Mark Ellis for the 2-0 lead in the first inning.
After solo home runs from Juan Uribe and Adrian Gonzalez, Kemp continued to dominate as he singled to center that scored Ellis for the 8-0 lead in the fourth inning.
The best bright spot for the Diamondbacks came in the sixth inning when Aaron Hill knocked out a solo home run, and still trailed 8-2.
Michael Young even contributed with an RBI triple in the eight inning that scored Ramirez.
Patrick Corbin (14-7) gave up six runs on seven hits in two innings of work in the loss. This was his shortest outing of the season.
Kemp had been sidelined with an injury since July 21st with an severe ankle sprain. Kemp worked his way back into the lineup, rehabbing extensively to prepare himself for the playoffs.
"He swung the bat good," Don Mattingly said. "I thought he looked good in the outfield, too, just turning, a couple of plays he ended up backpedaling and stuff. It looked like he was pretty easy out there."
The Dodgers magic number to clinch the NL West is 2 games, and Zack Greinke spoke about the importance of winning the division.
"It's nice...but it's not really the special part. Something special would be winning in the playoffs or the World Series."
The Dodgers ended a four game losing streak, and look to clinch the division on Wednesday as they send Stephen Fife to the mound in place of Clayton Kershaw. Dodgers have decided to give Kershaw some much needed time off in order to have him rested for the playoffs.