Add the Marlins to the list of teams interested in Pirates lefty reliever John Grabow.

According to a National League source, the Marlins and Pirates have discussed possible trade scenarios that would land Grabow in Florida. 

Upgrading the bullpen remains a priority for the Marlins as they hope to improve their playoff chances.

Grabow, 30, has appeared in 44 games for Pittsburgh, while posting a 3-0 record and 3.57 ERA in 45 1/3 innings. The Marlins bullpen entered Wednesday with the fifth best ERA in the National League — 3.79.

In second place behind the Phillies in the National League East, the Marlins are in the process of searching for experienced relievers. Grabow broke in with the Pirates in 2003, and he’s been in 389 games.

A durable lefty, he was involved in a career high 74 games and 76 innings in 2008.

Pittsburgh’s third-round pick in 1997, Grabow has 39 strikeouts and 28 walks on the season. Ironically, left-handed hitters are batting .275 against him, while right-handers have a .246 average. 

Grabow is signed for $2.3 million this year, and he will be eligible for free agency next season.

In recent weeks, Florida’s bullpen has added veteran right-handers Brendan Donnelly and Luis Ayala.

— Joe Frisaro