Stanfill was unofficially second on the 17-0 Super Bowl winning Dolphins team with 10 sacks (behind left defensive end Vern Den Herder's 10½) and was voted All-Pro by the Associated Press. He was a consensus All-AFC selection that unofficially led the Dolphins in sacks in 1973 with 18½ and was a consensus All-Pro and All-AFC selection as the 12-2 Dolphins won their second straight Super Bowl. His unofficial 1973 sack total still stands as the team record, although All-Pro Jason Taylor tied that mark in 2002 [https://web.archive.org/web/20070926223230/http://www.miamidolphins.com/newsite/records/individualrecords/sacks.asp]. On October 7, 1973, Stanfill set the unofficial single-game sack record versus the New York Jets. Two weeks later, teammate Den Herder tied that mark against the Buffalo Bills.