|Country (sports)||United States|
|Born||December 22, 1965|
|Height||6 ft 5 in (1.96 m)|
|Highest ranking||No. 180 (October 2, 1989)|
|Grand Slam Singles results|
|Highest ranking||No. 85 (November 13, 1989)|
|Grand Slam Doubles results|
|Australian Open||1R (1990)|
|French Open||1R (1990)|
Warner attended the University of Nevada, Las Vegas and won the PCAA singles title in both 1986 and 1987. He earned All-American honors in 1987 when he made the quarter-finals of the NCAA Championships.
The American had his best year on tour in 1989. He made his Grand Prix debut at Key Biscayne and defeated Argentina's Martín Jaite in the first round, before being eliminated in the second round by Mats Wilander. At the 1989 OTB Open, Warner made it to the quarter-finals, his best showing in a Grand Prix tournament. He got through qualifying at the 1989 Wimbledon Championships to make his only appearance in the main singles draw of a Grand Slam event and lost in the opening round to Miloslav Me?í?. With partner David Pate, Warner won the men's doubles title at the 1989 Australian Indoor Championships. He also won two Challenger tournaments that year.
|Win||1.||1989||Sydney Indoor, Australia||Hard||David Pate|| Darren Cahill
|6-3, 6-7, 7-5|
|1.||1989||Winnetka, United States||Hard||Ville Jansson|| Bill Benjes
|6-7, 6-4, 6-4|
|2.||1989||Bergen, Norway||Carpet||Grant Connell|| Rikard Bergh