Adair auditioned for guitarist David Martone, a Berklee College of Music graduate, who was starting an instrumental fusion band. This band, named Martone, recorded its first album in 1999.

In 2002, Adair joined the multi-platinum, Mississippi based band 3 Doors Down, as the touring and studio drummer. (Other drummers were used for video shoots and TV appearances.) During his time with the band they recorded the studio album Seventeen Days and live album Another 700 Miles, toured 14 countries and had multiple TV appearances.

Adair left 3 Doors Down to join the Canadian band Nickelback. In 2005, they released the album All the Right Reasons which debuted at #1 on Billboard and went multi-platinum. The follow-up album was Dark Horse; the first single on that album, “Gotta Be Somebody”, was released on September 29 in North America. The album was produced by Mutt Lange.

On October 21, 2007, James Stephen Hart (former frontman of Eighteen Visions) announced that Adair was recording drum tracks for his new band, Burn Halo.

In 2011, Adair along with the other band members of Nickelback released Here and Now. This album includes singles “This Means War” and “Bottoms Up”.

In 2020, Adair was diagnosed with Radial Tunnel Syndrome in his wrist.