William Anthony Blalock (born September 8, 1983) is an American former professional basketball player.

In the 2006-07 season, he averaged 11.9 minutes, 1.8 points, 1.1 rebounds, and 1.2 assists per game, under coach Flip Saunders.

His final NBA game was a 96–75 win over the Philadelphia 76ers, where he played just over six minutes, and recorded 2 points and 2 rebounds.

In the following season, he once again returned to the Reno Bighorns, but soon moved on to the Huracanes del Atlántico of the Liga Nacional de Baloncesto in the Dominican Republic.

In Blalock's final professional season in 2012–13, he rejoined his former teams, the Bighorns and the Mill Rats.