"We're very excited to have Austin join the Sooner baseball family," Golloway said. "He's been a really good player and a power bat for a program that had an undefeated season. We're looking forward to Austin having a very special career at the University of Oklahoma."
O'Brien batted a team-leading .402 with 10 home runs, 36 RBIs and 38 runs scored for Owasso High School, leading the Rams to a 36-0 season and 6A state championship.
He struck out just nine times in 107 plate appearances.
The 6-foot-2, 195-pound, right-handed infielder was also the 2013 Tulsa Metro Baseball Coaches Association Player of the Year.
O'Brien is a National Honor Society member who has maintained a 4.12 GPA.
O'Brien's father, John, holds the single-season record for home runs at Oral Roberts University and his uncle, Charlie, played 15 Major League Baseball seasons.
/// SoonerSports PR