Coincidentally, Perreault had worn #11 throughout his junior career, and kept it in Buffalo in honour of the roulette wheel choice. As expected, he became an immediate star. He scored a goal in the franchise's very first game, which was a 2-1 victory on October 10, 1970, against the Pittsburgh Penguins. During his first season, he led the Sabres in scoring (with 38 goals and added 34 assists) — a feat he would never fail to accomplish in any season in which he did not miss significant time to injury before his penultimate year — and won the Calder Trophy as rookie of the year.