Chris O'Meara/Associated Press
In 2012, this unit paved the way for a Pro Bowl season from running back Doug Martin. Last season was a much different story.
Injuries and subpar performance plagued the offense's front five throughout the entire season in 2013, helping contribute to a horribly inconsistent performance on that side of the ball. This led to a purge in the offseason, as veteran mainstays Donald Penn, Davin Joseph and Jeremy Zuttah were all given their walking papers.
Anthony Collins is the new starter at left tackle after signing a sizable free-agent deal this offseason. The former Bengal has plenty of potential, but this will be his first gig as a full-time starter on the blind side. Demar Dotson is the steadiest presence on the unit, and he should continue to carve out his place as one of the best right tackles in the league.
On the bench, things look pretty skinny. Jace Daniels will fight with fifth-round pick Kevin Pamphile and undrafted free agent Matt Patchan to make the final roster, but none of them are ready to step into a starting role in the event of an injury.
Depth is just as shaky at guard. Jamon Meredith should lock down the starting spot on the right side, while Carl Nicks has reportedly been medically cleared to return, giving him the top spot on the left.
But Nicks' health will always be a question mark, and the depth behind those two is shaky, at best. Patrick Omameh, free-agent pickup Oniel Cousins and fifth-round pick Kadeem Edwards aren't starting-caliber players at this point, making an injury at guard a scary proposition.
Free-agent addition Evan Dietrich-Smith replaces Zuttah at center, which should be an upgrade. But again, there's very little depth behind him.
Catching a theme here? The Bucs' offensive line has some solid players across the top of the board, but things don't look too peachy after that. Collins and Dietrich-Smith are somewhat of a mystery at this point, and an injury at any spot could spell serious trouble for this unit and the offense as a whole.
With so much doubt surrounding this group, it's impossible the rank them in the top half of the league until we see chemistry and results on the field.