As NHL play was postponed due to the labour dispute, Fleury continued to play with Wilkes-Barre/Scranton in 2004–05, where he posted a 26–19–4 record, a 2.52 GAA and a .901 save percentage. When NHL play resumed in 2005–06, Fleury started the season once more in the minors, but was quickly called up by Pittsburgh for a game against the Buffalo Sabres on October 10 to replace an injured Jocelyn Thibault. He continued to play between Wilkes-Barre/Scranton and Pittsburgh until November 28, after which he remained with Pittsburgh. With the Penguins finishing last in the Eastern Conference and allowing a league-worst 316 goals, Fleury recorded a 3.25 GAA and a .898 save percentage. Competing for time with Sébastien Caron and Jocelyn Thibault, Fleury emerged as the Penguins' starting goalie.