 Sestak served as the cornerstone of a defense that took the Bills to the playoffs four straight years (1963–1966) and consecutive AFL championships in 1964 and 1965.Over the 1964 and 1965 seasons, Sestak and his defense mates held opposing rushers without a touchdown for seventeen consecutive games, a Professional Football record that still stands.Twice during his outstanding career he realized the defensive lineman's "dream", returning interceptions for touchdowns, and once returned a recovered fumble for a score.