Shohei Ohtani is set to undergo season-ending surgery to address bipartite patella in his left knee.

The rare congenital condition was giving Ohtani discomfort as he increased the intensity of his bullpen sessions in recent weeks.

The Los Angeles Angels hope Ohtani can get on the mound again in late November and conclude his 2019 throwing program the following month, at which point he will be shut down for the buildup to the 2020 season.

Billy Eppler said the Angels expect Ohtani to be ready to pitch at the start of spring training. Contributing as a designated hitter, which he will do on the days he does not start, is not a concern.