Per Joe Frisaro:
JUPITER, Fla. -- Luis Castillo is now on the market, and the Marlins may have interest.
A source said the organization is having some internal discussions about whether to bring the 35-year-old back to Florida.
On Friday the Mets released Castillo. a switch-hitting second baseman. New York is on the hook to pay the $6 million on his 2011 contract.
Castillo could make sense for Florida if the team isn't sure prospect Matt Dominguez is ready to win the third base job. The 21-year-old Dominguez, currently the frontrunner to be the Opening Day starter, is batting .219 in 32 Grapefruit League at-bats.
If the Marlins do look to sign Castillo, he could play second and Omar Infante could switch to third base.
Castillo was with the Marlins from 1996-2005. He was a three-time All-Star and three-time Gold Glove winner in Florida.
Luis might be older but he's still a great asset to have on the squad.