With the Texas Longhorns baseball team, Cox set the record for the most appearances in the College World Series with 13 and in 2005 tied the UT record with Charlie Thames for most saves in a single season with 19.
[3] Cox had a 6-2 win–loss record and a 1.75 earned run average for the Trenton Thunder of the Class AA Eastern League in 2006.
[4] That year, Mark Feinsand of MLB.com wrote, "Some are projecting him as the eventual replacement for all-world closer Mariano Rivera.
[7] In 2007, Cox was listed as the eighth best prospect in the New York Yankees organization and owning the best slider in the farm system.
Cox was hired as a volunteer student assistant for the Texas Longhorns after retiring from playing.