There’s an outside chance Florida Republicans could have yet another open seat on their hands in 2010: the 21st Congressional District.

The Palm Beach Post reports that Republican Gov. Charlie Crist asked 21st District Republican Rep. Lincoln Diaz-Balart to fill out an application for the soon-to-be-vacant U.S. Senate seat.

Crist is tasked with appointing a successor to Republican Sen. Mel Martinez, who announced Aug. 7 he will soon resign.

The Post reported that Crist sent Senate applications to two other potential successors: former U.S. Attorney Roberto Martinez and Jim Smith, former Florida Secretary of State and state Attorney General.

*CORRECTION: Corrects to say former U.S. Attorney Roberto Martinez, not former Gov. Bob Martinez, received an application.*