Martin (hamstring) was not at the portion of Tuesday's practice open to the media, Greg Auman of the Tampa Bay Times reports.
Martin is also unlikely to attend the closed portion of practice, as it's already been reported that he'll probably be out until after Tampa Bay's Week 6 bye. The bigger question pertains to Charles Sims, who missed Tuesday's practice with a knee injury that he played through in Sunday's loss to Denver. If the Bucs don't have either Martin or Sims, they'll have to turn to Jacquizz Rodgers and Peyton Barber against the Panthers on Monday.