Marlins slugger Giancarlo Stanton is close to finalizing a 13-year, $325 million deal with the team, according to multiple reports.

The proposed deal would be the largest in baseball history, eclipsing the $292 million, eight year deal of the Tigers' Miguel Cabrera which was agreed to in March. Cabrera's was an extension, so the record contract still belongs to Alex Rodriguez, who signed a 10-year, $275 million deal with the Yankees.

Stanton, who turned 25 last week, hit. 288 this past season with 37 homers, which led the National League, and 105 RBIs.

His season was cut short when he was hit in the face by a pitch.

Stanton had been critical in the past of the Marlins and the way they let go of their players. But the Marlins have made locking up Stanton, who finished second to Clayton Kershaw of the Dodgers in National League MVP voting, a priority this offseason.

President of baseball operations Mike Hill said earlier this week that the team had begun discussions with agent Joel Wolfe regarding an agreement with the right fielder.

Among the items still open to negotiations could be a no-trade clause, which the Marlins in the past have been reluctrant to give.