A 6-foot-2, 180-pound junior, Trickett will start in place of Ford Childress, who Holgorsen said tore a pectoral muscle.
Trickett shared the quarterbacking duties with Paul Millard in West Virginia's 24-17 come-from-behind victory over William & Mary to open the season. He was 0-for-2 passing in the game.
Trickett played in 17 games, starting two, at Florida State before transferring to West Virginia in May. He played in eight games for the Seminoles as a backup quarterback last season, completing 22 of 34 passes for 272 yards.
Trickett is the son of Florida State offensive line coach Rick Trickett.
Clint Trickett, a transfer from Florida State University who has only thrown two passes through the team's first three games, will be West Virginia's starting quarterback when the Mountaineers play host to 11th-ranked Oklahoma State on Saturday, West Virginia head coach Dana Holgorsen said Thursday night on his weekly radio show.