Granato served as head coach of the
Green Bay Gamblers and
Wisconsin Capitols of the
United States Hockey League (USHL) from 1993 to 1997, where he led the Gamblers to the league finals. He was then hired by the
Columbus Chill of the
East Coast Hockey League (ECHL) in 1997 and then
Peoria Rivermen in 1999. He won the
Kelly Cup as a coach in
2000 with the Peoria Rivermen and was then promoted to head coach of the
Worcester IceCats of the
American Hockey League (AHL). On June 15, 2017, he became an assistant coach, along with
Ulf Samuelsson, under
Joel Quenneville of the NHL's
Chicago Blackhawks. In 2019, he was hired as an assistant coach of the
Buffalo Sabres. On March 17, 2021, Granato became the interim head coach of the Buffalo Sabres, replacing the fired
Ralph Krueger. Granato posted a 9–16–3 record in 28 games with the Sabres to finish off the 2020–21 season head coach. The interim tag was removed on June 29. During the 2022–23 season, Granato led the Sabres to their first winning season since 2011, despite the team falling one point short of making the playoffs. The Sabres failed to follow up their success the following season, extending their NHL-record playoff drought to 13 consecutive years. Following the 2023–24 season on April 16, 2024, Granato was fired by the Sabres. On March 25, 2026, Granato was named head coach of the
United States men's national ice hockey team that will compete at
2026 IIHF World Championship. ==Head coaching record==