Tadlock guided the Grayson Vikings to back-to-back National Junior College Athletic Association (NJCAA) Division I World Series titles in 1999 and 2000.
[6] Tadlock graduated from Texas Tech in May 1992, earning a bachelor's degree in physical education.
In August 1994, Tadlock earned a master's degree in education from the University of Texas at Tyler.
The Red Raiders would win two straight 1–0 games, the fewest runs scored ever since the Super Regional format was introduced in 1999.
[9] The Lubbock Super Regional championship earned the Red Raiders their first College World Series berth in program history.
[4] The Red Raiders would go on to lose two games in the College World Series, finishing with an overall season record of 45–21.
[4] The team's finish of 8th place in the USA Today Coaches' Poll tied the 1995 8th-place ranking as the highest in school history.
The 19–5 record represented the 4th best win percentage in conference history, earning Tadlock a contract extension through 2022 and $100,000 raise.