Jansen, who has been sidelined with a recurrence of an irregular heartbeat, was hopeful to come back for this weekend's series against the Giants, but there was also a possibility he would be done for the season.
"It's like middle news," manager Don Mattingly said. "We were hoping Friday."
Jansen is expecting to have non-open-heart surgery called cardiac ablation, but it is not definite. He is hopeful the surgery will allow him to stop taking medicine and keep him healthy in the long term without needing to worry about hypertension during games.
He said the expected recovery time for the surgery would be one to two months.
"I'm doing good for right now," he said. "It might come back. Nobody knows."
Jansen was pleased with the news and he is excited for an opportunity to help the team over the final two weeks of the season.
Until he comes off the blood-thinning medication, Jansen will continue his throwing and baseball activities on his own before the rest of the team practices. He has also been absent from the dugout during games to avoid the risk of a ball hitting him while on the medication.
"Keep my mind positive and stay ready so whenever I'm off the medicine, I'm ready to roll again," Jansen said.
In his absence, the Dodgers have been using Ronald Belisario and Brandon League in the closer role. Mattingly will continue to alternate between the two depending on matchups and who is fresher.
"I'd like to get there a little cleaner than have to use four or five guys a night," Mattingly said. "But if that's what we have to do, then it's where we are at right now."