Dan Haren is leaning towards retirement at the end of the season.

When the Miami Marlins traded him to the Chicago Cubs last week, Haren tweeted that he would wearing jersey #50 as a Cub, which was his number when he first broke into the Major Leagues "and it'll probably be my last."

When asked about the tweet, the right-hander expanded a little bit and left the door open for 2016.

"I would say right now the chances are this will probably be it," he said. "I don't want to say this is it and pull a Brett Favre. That's why I said 'probably' [on Twitter]. At least I leave myself a little way out.  Chances are this is it.  After the season, I'll relax and see where I'm at. I definitely want to make a push to get to where this team wants to go."

Haren considered retiring last offseason after being traded from the Los Angeles Dodgers to the Marlins.