Report: Dodgers RP Jansen out until September

Dodgers closer Kenley Jansen is expected to be sidelined up to one month after he was sent to Los Angeles from Colorado to see his cardiologist because of an irregular heartbeat on Thursday.

ESPN reported Friday that Jansen is expected to be out “about a month,” citing unnamed sources.

Jansen, who has been treated for an irregular heartbeat in the past, returned to the team hotel on Thursday night when he was feeling ill. He went to the hospital in Denver with the team’s trainer before the decision was made to send Jansen back to Los Angeles.

“We’re holding out hope it’s not too serious,” manager Dave Roberts said.

The Dodgers’ four-game series with the Rockies runs through Sunday.

Jansen shares the National League lead with 32 saves entering Friday. The Dodgers used Scott Alexander to close Thursday’s victory at Coors Field.

Roberts said altitude could be a factor.

Jansen suffered an irregular heartbeat in Denver in August 2012 and needed a procedure to return his heart to a normal rhythm.

“Anytime you’re talking about the heart and irregular heartbeat, you’ve got to be very careful with it,” Roberts said.

–Field Level Media