Buffalo posted a 5–5–2 win–loss–tie record in 1949, Gibron's only season with the team. That record made Bills the last-ranked team in a four-team Shaughnessy playoff held at the end of the season. The playoff was instituted after the AAFC's financial struggles led to the consolidation of its divisions that year. The Bills lost in the first round of the playoffs to the Cleveland Browns, and subsequently lost to the Chicago Hornets in a game for third place. The AAFC dissolved after the season, and the Browns, San Francisco 49ers and Baltimore Colts were absorbed into the NFL. Gibron was selected as a second-team All-Pro by sportswriters after the season and was named the AAFC's rookie lineman of the year.