I had Clayton too. I have quite a few receivers though so I'm gonna try and find a decent RB instead.
Nate Burleson might be a good pick-up, too. Had a good first game back, and will get looks with the opponent covering Calvin. Btw, I'm assuming your in a 12-team league like me, and there's nothing noteworthy available.
If it's a PPR league than Amendola is a no-brainer. Targets and catches are through the roof. Not the greatest end zone threat, so non-PPR it's worth seeing what else is out there.