Los Angeles Dodgers closer Kenley Jansen is expected to be out about a month while he undergoes treatment for an irregular heartbeat, according to ESPN's Buster Olney.
Jansen went to the hospital with an irregular heartbeat before a game Thursday against Colorado and was flown back to Los Angeles, where he will visit a cardiologist for more tests.
Manager Dave Roberts said after the Dodgers’ 8-5 win that Jansen was at the hotel earlier in the day and didn’t feel right. Jansen called the trainer and was taken to the hospital.
Jansen has dealt with an irregular heartbeat in the past, having been hospitalized in 2011 and 2012. In October 2012, he underwent heart surgery.
His current condition is considered "very manageable," according to The Athletic's Ken Rosenthal.
Roberts said the team is “holding out hope it’s not too serious.” Roberts didn’t know if the team would make a roster move in Jansen’s absence.
The Dodgers used Scott Alexander to close the ninth Thursday. Jansen has 32 saves this season, tied for the most in the National League this season.