It has to be Todd. He was a fullback at BYU and quite successful at it. Then made a name for himself in the NFL as all pro Tight End mostly with the Raiders. Read most of the posts and most were a bit of a stretch. Yes Jim McMahon did some punting in his time at BYU, and yes Rob Morris ran a few plays as a running back and many BYU players came to BYU having played a particular position in high school only to switch positions at BYU. But none accomplished what Todd did, a very successful fullback at BYU and a very successful tight end in the NFL.