The Cleveland Gladiators were an arena football team based in Cleveland, Ohio, and members of the Arena Football League (AFL). The Gladiators played their home games at Quicken Loans Arena, which they shared with the Cleveland Cavaliers of the National Basketball Association and the Cleveland Monsters of the American Hockey League. The franchise was originally based in East Rutherford, New Jersey, and then later in Las Vegas, Nevada, before relocating to Cleveland for the 2008 AFL season. The Gladiators qualified for the playoffs eight times in their history, reaching the ArenaBowl in 2014.

The Arena Football League (AFL) can refer to one of three successive professional indoor American football leagues in the United States. The first of these was founded in 1986, and played its first official games in the 1987 season, running for 22 consecutive seasons until going bankrupt following the 2008 season. The second league, consisting largely of teams from the first AFL and arenafootball2, purchased the first league's assets out of bankruptcy and resumed play in 2010 as a continuation of the first AFL; this second AFL ran for ten further seasons, before again going bankrupt following the 2019 season. The third and current AFL, which is not directly connected to the previous two iterations of the league but claiming their histories and trademarks, launched in 2024.