10 NFL rookies who'll stink in 2010 - By Rotoworld's Chris Wesseling

Sam Bradford, Rams QB
Bradford still has to clear the training camp contract hurdle for a legit shot to enter the season as the starter. His long-term outlook remains strong due to uncanny accuracy and an ability to make all of the throws. Just don't expect any miracles on a team widely considered to be the league's doormat.

Jimmy Clausen, Panthers QB
Clausen doesn't have a puncher's chance of unseating Moore for the Week 1 starting job. Worse, he failed to overtake strong-armed Hunter Cantwell as the second-stringer heading into training camp. Clausen will need Moore to stumble out of the gates to see the field before Halloween.

Toby Gerhart. Vikings RB
Chester Taylor at least had the third-down skillset and veteran savvy to keep Peterson on the bench for a well-timed breather. It's hard to see Gerhart contributing in a similar role when Peterson is superior as a receiver and a pass blocker. The second-rounder is more of a pure backup as opposed to a backfield complement.

Rob Gronkowski, Patriots TE
Gronkowski does have three-down potential as a Todd Heap clone, but he's still just 21 years old at a position that often takes a couple of years to master at the NFL level. Patriots fans will have to delay their gratification on the 42nd overall pick.

Taylor Mays, 49ers S
Mays spent the majority of the offseason running with the third team. The coaching staff is impressed with his progress, but his coverage skills remain a major question mark. Reggie Smith still looks like the favorite to enter the season as the No. 3 safety, with Mays starting out as a special teams dynamo.

Dexter McCluster, Chiefs WR/RB/KR
The problem is that McCluster has neither Harvin's talent or physicality. Harvin is one of the league's strongest receivers, but McCluster may be the league's most fragile slot man at a slight 5-8, 165 pounds. Can he take the brutal licks? Can he beat the jam at the line of scrimmage? He'll have much to prove on both counts while splitting snaps with Todd Haley favorite Jerheme Urban as the No. 3 receiver.

Derrick Morgan, Titans DE
There is a vacancy in Kyle Vanden Busch's old spot, but Morgan is fighting an uphill battle after missing so much practice time in May and June. With veteran pass rushers Jacob Ford, Dave Ball, and Jason Babin also in the mix, the Titans can afford to bring Morgan along slowly.

Jason Pierre-Paul, Giants DE
If nothing else, Pierre-Paul figures to get caught in a numbers game. The team's best defensive player, Justin Tuck, holds down once defensive end spot while Osi Umenyiora and Mathias Kiwanuka figure to split snaps on the other side. Consider this a redshirt year for Pierre-Paul.

Demaryius Thomas, Broncos WR
"Bay-Bay" does offer a tremendous size/speed package as a situational deep threat and red-zone weapon for the Broncos. Still, it's going to take at least a year or two before he can consistently beat NFL corners to the point where he can be considered a viable No. 1 receiver.

Tim Tebow, Broncos QB
Tebow will play. Similar to his freshman season at Florida, Tebow will offer the Broncos a different look on goal-line packages. The rest of his rookie season will be spent watching Kyle Orton learning how to read defenses, adjust his mechanics and develop arm strength. Whether or not Tebow becomes a star at this level, we're at least a year from finding out.