According to Howard Balzer, the Indianapolis Colts brought in three free agent centers for tryouts on Tuesday including Gino Gradkowski, Anthony Fabiano and C Patrick Lewis.
Of this group, the Colts signed Fabiano to their practice squad.
Gradkowski, 28, is a former fourth-round pick of the Ravens back in 2012. The Panthers signed Gradkowski to a three-year, $3.15 million contract last year and he set to make a base salary of $875,000 for the 2017 season.
The Panthers placed Gradkowski on injured reserve back in September and later released him with an injury settlement.