Leiter broke in with the Yankees in 1987. Last year, with the Mets, the veteran was 10-8 with a 3.21 ERA.
Leiter was with the Marlins in 1996 and 1997. He was 27-21 in 55 starts for Florida.
The prospect of Leiter serving on the Marlins broadcast team in the future could be intriguing. Leiter was part of the Fox broadcast team during the playoffs, and Marlins TV play-by-play announcer Len Kasper signed a multi-year contract to broadcast for the Cubs on Friday.
The Marlins are also working on re-signing backup infielder Damion Easley.
The team could be close to losing veteran backup catcher Mike Redmond, who has spent his entire career in the Marlins organization.
The relocated Washington team and the Phillies, along with eight American League clubs, have interest in Redmond.
Joe Frisaro is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.