It is always dangerous to rush to conclusions based on a small sample size (as Browns RB Trent Richardson proved to those who wrote him off after Week 1). However, with two weeks of the season down, it is hard not to be a bit alarmed about the following players.
Chris Johnson (RB, Titans): Many will blame Johnson's O-line, but he has also looked hesitant hitting the hole. On the plus side, the Titans gave him too much money not to keep handing him the ball. Don't give up entirely, but lower your expectations dramatically.
Steven Jackson (RB, Rams): He has long suffered from a lack of talent around him, and now he has young RBs nipping at his heels. However, the Rams look better this year and I think he could bounce back once his minor injury heals.
Jamaal Charles (RB, Chiefs): After looking good in Week 1, nobody seems to know why he disappeared against the Bills. However, it seems clear that Kansas City plans to get multiple RBs involved, and that will take opportunities away from Charles. If you own Charles, it is time to start feeling nervous.
Larry Fitzgerald (WR, Cardinals): Without proper weapons around him, teams have focused all of their energy on shutting him down. Then again, this has been true for years and it's never stopped him before.
Wes Welker (WR, Patriots): The emergence of RB Stevan Ridley and TE Aaron Hernandez has taken opportunities away from Welker. I expect his numbers to rise while Hernandez is injured, but if I could get decent value I would try trading him away in the next few weeks.
Fred Davis (TE, Redskins): While he is very talented, as long as QB Robert Griffin III seems to not know what a tight end is, you can't count on him.
Alex Case is amNY's fantasy football columnist.