Jansen is meeting with specialists next week to determine the timing of his catherer ablation and projected rehab. He is expected to be back healthy in time for Spring Training.
The 25-year-old reliever missed three weeks in August and September with the recurrence of an irregular heartbeat that required blood-thinning medication.
League was excellent in Jansen's absence and down the stretch. Entering Wednesday, he had tossed scoreless relief in 20 of his last 21 appearances with a 0.40 ERA, which will make him a desirable target in free agency.
But thanks to an expected healthy Jansen and Scott Elbert, as well as the return of Ronald Belisario, who is 8-1 with a 2.54 ERA in 68 games, the back of the bullpen isn't much of a concern for the Dodgers, even if League doesn't return.
"We are looking forward to doing different things, but nothing scares me about the back end because I know Kenley is there no matter what happens," Mattingly said.