Testaverde's professional career was principally characterized by its longevity, lasting 21 seasons, playing with seven different teams. Despite being in the top 10 upon retirement in most career passing statistics (6th in career passing yardage, 7th in career touchdown passes, 6th in career completions), Testaverde was not an outstanding quarterback in terms of wins. His 123 losses as a starting quarterback is an NFL record, and his career regular season winning percentage of 42.3% is the lowest of any quarterback with at least 70 wins. He played in five postseason games in his NFL career with a record of 2–3. Testaverde had a strong arm but had a tendency to commit turnovers.