Pro day struggles for WR Tandon Doss

Wednesday marked the first opportunity for Indiana WR Tandon Doss to work out for NFL scouts after undergoing surgery on a groin injury on Dec. 12.

Based on the results we're getting from scouts in attendance his performance has been underwhelming. Doss ran the 40-yard dash in 4.63 seconds, below the average time at the past three NFL combines (4.55) and for NFL receivers (4.52).

His 4.18-second short shuttle is well above the three-year average (4.30) but his 4.70 in the three-cone drill was also below the average (6.94).

We really liked what we saw from Doss on tape following the 2010 season and gave him a second-round grade based on his ball skills, route-running/separation skills and fluidity on film.

However, it's been a frustrating pre-draft process for Doss thanks to surgery and rehab, and concerns about his durability and top-end speed will likely drop him to the third.

Versatility could help OT Smith

Nebraska OT Mike Smith missed the 2010 season after breaking a leg during fall camp, and Smith doesn't have the length or agility teams covet at tackle. He had some problems protecting the edge on his 2009 film but he could still get drafted late thanks to his versatility.

Smith can line up at center and/or guard if he doesn't work out at tackle. If he can provide depth at multiple positions he could free up a roster spot for a team to get help elsewhere.

OLB Addison could contribute in 3-4 scheme
Troy OLB Mario Addison isn't a natural fit for a lot of schemes. Addison lined up at end in college but isn't big enough to anchor there in the NFL and he doesn't appear fluid enough on film to develop into a strongside linebacker in a four-man front. In fact, he's even slightly undersized for an outside linebacker in 3-4 fronts like the ones the Jets, Patriots and Ravens run.

However, he has enough burst, agility and size to transition to outside linebacker for a 3-4 front like the ones in Pittsburgh and Arizona, which don't value size as much. It's also worth pointing out that Addison dropped into coverage from his defensive end spot at times and played linebacker at the community college level so he has some experience playing in space. He, like Smith, could come off the board late.

OT Bell excels in run game

It's not hard to locate New Mexico OT Byron Bell when you throw on tape of the Lobos. At 6-foot-47 and 337 pounds Bell is a mountain of a man who can swallow defenders as a drive blocker. His kick step and ability to protect the edge also jumped out, but the more film you watch the clearer it becomes that he's so aggressive taking away the corner that he's vulnerable to getting beaten inside at the snap.

He's not a player teams should feel comfortable asking to protect the quarterback's blind side, and he may even be a better fit at guard. Add in some concerns about his character and Bell projects as a late-round pick.