LOS ANGELES -- Dodgers closer Kenley Jansen said he could be back pitching Sept. 7 at the earliest or out four weeks and the rest of the season depending on how a meeting with doctors goes on Tuesday.

Jansen, who is on blood thinners until at least Monday, threw a 25-pitch bullpen session Friday, and he plans to play catch Saturday.

While being stretched out before last Tuesday's game, Jansen said he felt a similar irregular heartbeat to what happened last year and he immediately called for the paramedics. After an overnight stay in a Colorado hospital Tuesday, Jansen was released during Wednesday's game and he had tests again Thursday.

Having spent a month on the disabled list last year with an irregular heartbeat, Jansen said this most recent episode wasn't scary like the first time it happened. Although he said it is frustrating, he is willing to accept any prognosis from the doctors.

"It's my life, I can't play around with that," he said, adding he feels fine. "It's going to be frustrating because I really want to help this organization and help my teammates. But what can I do? This is stuff you can't control. It's just nature."

Jansen said the possibility of surgery is out there for down the road, but he's awaiting word from the doctors before rushing to any judgment. He drastically changed his diet after going through similar problems last year, and he cut out caffeine, soda and alcohol completely.

"You really want to be out there to help your teammates because we all know what we want to accomplish and what we want to do for this city," Jansen said. "It's frustrating. Hopefully my health gets better and I have a long career."

If the news comes back positive from Tuesday's appointment and he is able to come back at the end of the week, manager Don Mattingly plans to reinsert Jansen back into the closer role immediately. Until then, he said he will play matchups and go with either Brandon League or Ronald Belisario.

Colletti, Mattingly meet with Dodgers newcomers

LOS ANGELES -- General manager Ned Colletti and manager Don Mattingly held a unique meeting with the eight newly acquired Dodgers Friday as the club struggles with the integration of its radical makeover.

Hanley Ramirez, Randy Choate, Brandon League, Shane Victorino, Joe Blanton, Adrian Gonzalez, Josh Beckett and Nick Punto squeezed into Mattingly's office in a follow-up to the full team meeting Mattingly held after Thursday night's 2-0 loss to the D-backs.

Mattingly declined to discuss details of the Friday meeting with the new players other than to emphasize that nobody had done anything wrong.

But earlier he discussed the challenges of turning over one-third of the roster during a pennant race and the urgency to get the Dodgers playing as a team with 30 games remaining.

"We've got eight new guys that haven't been through Spring Training or the fight to this point," Mattingly said. "Just making sure everybody's on the same page as everybody else."

Although the Dodgers could use another reliever with the uncertain health of closer Kenley Jansen, no deal appeared imminent approaching Friday night's 8:59 p.m. PT waiver deadline to add players who would be eligible for the postseason.

Mattingly said that when rosters expand Saturday, the Dodgers will likely promote Tim Federowicz from Triple-A Albuquerque to be a third catcher and Javy Guerra for bullpen depth.

Disabled shortstop Dee Gordon is eligible to return from his rehab assignment Monday, although Mattingly said earlier this week that Gordon won't start when he returns, with Ramirez now at short and Luis Cruz excelling at third base.

When Albuquerque's postseason play is done, the pool of players that might get callups includes Bobby Abreu, Tony Gwynn, Stephen Fife, Josh Wall, John Ely, Elian Herrera, Alex Castellanos and Scott Van Slyke.

Kemp returns, bats cleanup for first time this year

LOS ANGELES -- After two days out following his collision with the Coors Field wall on Tuesday, Matt Kemp was back in the Dodgers' lineup for Friday night's game and batting cleanup for the first time this season.

Manager Don Mattingly said Kemp felt fine hitting in the cage and he would start unless his shoulder tightened up before first pitch.

With the slugger back in the lineup, Mattingly opted to flip Kemp and newly acquired Adrian Gonzalez in the third and fourth spots. After a breather on Thursday, second baseman Mark Ellis was back leading off with Shane Victorino behind him. Gonzalez and Kemp were followed by Hanley Ramirez and Andre Ethier.

Mattingly said he made the change to further separate Gonzalez and Ethier, both lefties, and create matchup problems out of the bullpen for opposing managers. He said both Kemp and Gonzalez were fine with the switch.

Worth noting

• Left-hander Ted Lilly, dealing with back pain, said he is feeling pretty close to getting back to 100 percent and he would like to be able to throw off the mound Saturday. He is still hopeful he can throw out of the bullpen in September.