Former NFL quarterback Peyton Manning is already being talked about as a possible Republican contender to compete for Tennessee Sen. Bob Corker’s U.S. Senate seat after Corker revealed Tuesday that he will not run for re-election in 2018.

A Tennessee Republican source told the Washington Examiner that Manning was one of three names that came to mind as potential GOP candidates, along with Rep. Marsha Blackburn and Gov. Bill Haslam.