sentences:  Nelson retired in 2004 and was replaced by Pat Henry
  
  A 2-time Big 12 Coach of the Year, Nelson's 400-meter relay team finished second at the NCAA meet three times and won the national title in 1988 and won another title in 1997.A&M's 1600-meter relay won the outdoor championship in 1989 and an indoor crown in 1994.During his 14 years as head coach, Nelson led the Aggies to one Big 12 team championship and 17 Top 25 men's and women's team finishes at nationals.