【How-to】Do quarterbacks have earpieces - Howto.org

According to Zimmer, a quarterback yelling hut or variations like hut 1, hut 2, hut 3 is taking a cue from military cadence. In the service, hut often replaces a syllable in a word to make it sharper and more distinctive. Think of a drill sergeant yelling “atten-hut!” (“attention!”) at cadets.