J.W. St. Clair has the highest winning percentage of any coach of football and men's basketball in North Texas history.
St. Clair coached football at North Texas from 1915 to 1919, basketball from 1916-17 to 1919-20 and 1921-22 to 1923-24, and baseball from 1922 to 1924.
As the second football coach in school history, St. Clair guided the Mean Green to its first winning season, a 4-1 mark in 1915. By the end of that inaugural season, North Texas was over .500 as a program and has never since fallen below .500. St. Clair posted a winning record in four of his five seasons, compiling a record of 20-10-2, a .656 winning percentage. That remains the best winning percentage for any football coach in school history.
As basketball coach, St. Clair was 58-21, a .734 winning percentage, the best percentage in the history of North Texas basketball. He posted a winning record in six of his seven seasons, and his teams scored wins over Texas, TCU and Baylor. St. Clair's 1922-23 team went 13-1, the best winning percentage (.929) of any season in school history. He also owns the second-best season winning percentage, the .917 rate of 1921-22's 11-1 record.
As football and basketball coach, St. Clair was 79-31-2, a .712 winning percentage.
As baseball coach for three seasons, St. Clair's teams recorded one winning season and were 16-26 overall.
In 1924, St. Clair became basketball coach at SMU, where he coached from 1924 to 1938 and posted a record of 132-108. He also coached SMU baseball in 1927 and 1931-33.
Overall, St. Clair's career mark in all three sports was 244-199-3.
In 1938, he became executive secretary for the Southwest Conference until his death in 1945 at age 60.