Lowhorn[1] attended International Studies Academy in San Francisco his freshman year of high school, where he was a standout in basketball.

[2] On December 16, 2002, Lowhorn led his Riordan team to the Burlingame Tournament Championship, breaking the school's single-game scoring record with 48 points.

[4] Lowhorn attended Texas Tech University, where he averaged 7.6 ppg and 3.2 rpg while playing for coach Bob Knight.

Due to another university coaching change, Lowhorn played under former NBA player Rex Walters.

During Lowhorn's senior year he broke the fastest to 1,000 points record previously held by USF Hall of Famer and ten-time NBA champion Bill Russell.

[5] After the 2009–2010 season, Lowhorn was invited to pre-draft workouts with the Portland Trail Blazers, Sacramento Kings and Golden State Warriors.

[8] Lowhorn spent the 2019-20 season with Pelita Jaya Bakrie of the Indonesian Basketball League (IBL).