From Adam Rittenberg's mailbag from his ESPN blog:

John from Boston writes: Adam, www.blackshoediaries.com reported on April 1st of rumors that Penn States Daryll Clark ruptured his achilles tendon. Have you heard anything about this in your travels? Other sources you have quoted said he has had limited sessions against a strong defense. Makes me wonder if that is why he has been limited. I hope it is not true.

Adam Rittenberg: The key thing to remember is April 1 -- as in April Fools'. It's OK, they almost got me, too. Daryll is fine.