It’s the bye week for the Tampa Bay Buccaneers and that means it's time for a position-by-position analysis.

Let’s start with the offense:

Quarterbacks: Veteran Josh McCown opened the season as the starter, but never was able to get the offense into a rhythm. McCown suffered a thumb injury in the third game and remains out. Second-year pro Mike Glennon has stepped up and done a nice job. Glennon has given the Bucs a downfield passing game. Coach Lovie Smith might think differently, but I think Glennon should remain the starter even after McCown gets healthy. GRADE: C

Running backs: This was supposed to be a position of strength, but it hasn’t been anything close to that. Doug Martin returned from last year’s shoulder injury, but he hasn’t looked anything like he did as a rookie in 2012. Martin is averaging only 2.5 yards per carry. Most of the blame goes to the offensive line for not opening enough holes, but Martin deserves to be partly to blame. GRADE: F

Wide receivers: Vincent Jackson has been quiet by his standards. The Bucs need to do a better job of getting the ball to their top playmaker. Rookie Mike Evans has shown plenty of potential. Louis Murphy was signed off the street and has made a nice contribution. Rookie Robert Herron has been brought along slowly, but the Bucs gradually have increased his role in recent weeks. GRADE: D+

Tight ends: Rookie Austin Seferian-Jenkins has taken over as the primary tight end with Brandon Myers also playing a key role. Seferian-Jenkins has flashed some promise, but also has dropped some catchable passes. GRADE: D

Offensive line: This unit hasn’t clicked. The run blocking has been poor. The pass blocking was good for a few games, but it fell apart in a five-sack game against Baltimore. The Bucs have a lot invested in this offensive line and they should be getting better results from it. GRADE: D-