[stevesmith]

Originally posted by Texas Aggie
I had a play last night (Tex/NCAA) where an outside receiver, but a back, went downfield, then came back toward the center of the LOS and blocked a pursuing defender below the waist. At the time, I couldn't put it together, so I didn't flag it.

Glad I didn't, because when I got home and studied the rule, the restriction is for a LINEMAN. This was a legal play.

Can you explain this differently? Sounds like a textbook crackback to me!