SAN FRANCISCO – Brandt Snedeker has withdrawn from the U.S. Open due to a rib injury and will be replaced by amateur Jordan Spieth, who recently completed his freshman year at Texas.

Spieth competed in sectional qualifying at Lakeside Country Club in Houston, shooting matching rounds of 70 to earn the first alternate spot. The two-time U.S. Junior champ will tee off at No. 9 at 4:14 p.m. ET on Thursday with reigning FedExCup champ Bill Haas and Nick Watney.

The injury also caused Snedeker to withdraw prior to the third round of the Memorial Tournament.