William Thomas Stanfill (born January 13, 1947) is a former defensive end for the Miami Dolphins of the American Football League and then the NFL after the AFL-NFL merger of 1970.
He played for the Miami Dolphins from 1969-'76. As the NFL did not officially maintain sack records until 1982, he unofficially led the Dolphins in sacks in 1969 with eight (Still an unofficial team rookie mark that was tied by Lorenzo Bromell in 1998), and picked off 2 passes and returned both for touchdowns. Voted to the 1969 AFL All-Star game. He went to the AFC-NFC Pro Bowl from 1971 through 1974)
In all, Stanfill unofficially totaled 67½ career sacks, which was the team record until broken by Jason Taylor, who now has 131 career sacks with the club (139.5 overall). He also is unofficially tied for 4th in the Dolphins' playoff record for sacks with 4 (tied with Bob Baumhower). Stanfill was mentioned by Hall of Famer Nick Buoniconti in his induction speech as being an unsung player on the early 1970s Dolphin teams and as being worthy of consideration for the Hall of Fame.
In 2007, he was voted to the All-Time Miami Dolphin team.
Bill Stanfill was inducted (with Jake Scott) into the Miami Dolphins Honor Roll on November 18, 2010.