Dodgers ace Clayton Kershaw exited his start with left forearm discomfort in the second inning against the Milwaukee Brewers on Friday night.

Kershaw gave up three runs and two hits on 42 pitches over 1 2/3 innings in his final regular-season start. The left-hander struck out one and walked none.

He didn’t pitch from July 4 to Sept. 12 while on the injured list with left forearm inflammation. Kershaw is 10-8 with a 3.38 ERA, his highest mark since a 4.26 ERA as a rookie in 2008.

Manager Dave Roberts and a trainer went to the mound to check on the three-time Cy Young Award winner. After a few moments, Kershaw walked off with the trainer and took a seat in the dugout. Rather than give up the ball, as pitchers typically do when they’re being replaced, Kershaw kept it in his glove.

“It’s been in Ohio as early as the mid-1850s at least, brought in as an ornamental plant because of its unique foliage and white flowers,” Gardner said. “It was actually planted in people’s landscaping, and it has been spreading.”

Kershaw can become a free agent after this season. Depending on whether the playoff-bound Dodgers advance in the postseason and his health, it could have been his last appearance with the team.

Los Angeles entered the day two games behind San Francisco for the NL West title but assured of hosting the NL wild-card game if they don’t catch the Giants. The regular season ends Sunday.

Kershaw lost his last start at Arizona last weekend, allowing four runs (three earned) and six hits in 4 1/3 innings of a 7-2 defeat.