Percival Truman was appointed League Commissioner in 1990, following the retirement of David Kent. Truman's first priority was to address the problem of steroids and other drugs in The League that came to the forefront the previous year with the death of Las Vegas Aces cornerback Deacon Taylor, and cast a fair amount of criticism on The League. Truman instituted a new policy that included random drug testing and fines and suspensions for players who test positive. Truman's efforts ended in disaster and began a tremendously inauspicious start to his reign, as the players resisted the effort and walked out, culminating in a four-year strike. Truman remained steadfast in his dedication to the policy, believing doing otherwise would result in an investigation by the federal government. Eventually, he compromised, eliminating the suspensions, but keeping the fines in place. The compromise allowed The League to return to play in 1993.

Truman managed to rekindle interest in The League despite the four-year absence and negative publicity from the steroid fiasco by purchasing the five-team Scrub League from Clive Hanson and annexing it as a third division. It was also presumably during Truman's tenure that Lyman Strang entered his franchise into The League. Truman's reign also saw The League finally make the wearing of helmets mandatory, following the devastating injury to New England Regulars quarterback Damien Bell. Despite Truman's efforts to control drug use and other vices in The League, they still exist, given the conduct of players during the first Blitz game.

In 2004, Percival Truman stepped down as Commissioner, claiming he wanted to spend more time with his grandchildren (this actually creates an inconsistency as, during the first Blitz game, which takes place during the 2005 season, the news scroll still mentions Truman as commissioner). He was succeeded by former Scrub League Commissioner Clive Hanson.