Lee missed the entire 2015 season after suffering a torn flexor tendon in his throwing elbow during spring training. He only pitched 13 games in 2014 and was last effective over the course of a whole season in 2013. He’s 37 now. And, after the Phillies understandably declined his 2016 option, is a free agent.
What the “right fit” would be for Lee is unknown, but given his recent track record and health, it had better be “a minor league deal with an invite to spring training” at best, or else he won’t be pitching in 2016.