''House Mover' to his teammates because of his incredible strength, Dunstan is built and moves like The Hulk.
In an interesting conversion process, he was drafted 14th by the 49ers in 1971 as a 214-pound linebacker, then drifted out of football. He built his weight up to his present size, tried out with the Eagles and stuck. He is the type who doesn't look like he'll hang on one more year, but does.
Dunstan was born in Oakland, and his father Elwyn 'Moose' Dunstan played for the Rams and Cardinals. Moose Jr. weight lifts like others breathe, and uses the Kung Fu agility program. He lumbered 46 yards for a touchdown in 1974; the ball was instantly retired."
-Rich Kucner, The Complete Handbook of Pro Football, 1977 Edition
"Bill was picked up from the Eagles in exchange for a future draft choice in April 1977. He appeared in 14 games for Philadelphia in 1976, was involved in 24 tackles and had three sacks.
He started all 14 games in 1975 and led the Eagles in total tackles and had five quarterback sacks. Bill returned a fumble for a 46-yard touchdown against San Diego in 1974.
He came to the Eagles as a free agent in 1973 after spending time on the taxi squads of the Jets and 49ers. He was a 14th round pick of San Francisco in 1971.
Bill was a three-year letterman as a 205-pound defensive end at Utah State where he was captain. He was an education major.
He used weight training and built himself up, and is a proponent of the Kung Fu agility program. His father, Elwyn, played in the NFL with the Cardinals and Rams from 1938-42."
-Buffalo Bills 1977 Press-Radio-TV Yearbook