Firkser dealt with an undisclosed injury during the offseason program, Jim Wyatt of TitansOnline.com reports.
Firkser wore a yellow jersey during practice, which indicates he was still working his way back from an injury. He saw a relatively healthy amount of playing time last season due to injuries on the depth chart ahead of him, but he's no lock to make the final roster again this season. Thus, a healthy beginning to training camp will be a good start for the 24-year-old.