Tim Leos was born in Tulsa, Oklahoma, in 1966.  His first introduction to tennis was at the age of eight with Frank Ward at his Tracy Park summer tennis camp. 

When Tim was fourteen, he finished the year ranked number one in the Missouri Valley in both singles and doubles, finished 4th in the National Hard Courts, and finished 6th in the National Clay Courts.  He finished the year ranked 8th nationally.  After moving into the 16s, Tim was ranked 11th in the country, getting to the semifinals of the Kalamazoo doubles.  Tim played high school tennis at Cascia Hall and placed 2nd in State at # 1 Singles as a freshman and sophomore.  He was a State Champion at # 1 Singles as a junior.  He finished his three-year career at Cascia Hall with only four losses and was named to the Oklahoma All-Decade Tennis Team for the 1980s. 

Tim moved to the Bollettierie Tennis Academy in Bradenton, Florida, in 1984 to complete his senior year in high school and trained with tennis greats such as Andre Agassi, Jim Courier, and David Wheaton, and many other top juniors.  He qualified for the Orange Bowl and tried out twice for the U.S. Junior Davis Cup Team.  Tim also played in the qualifier for the 1984 Olympics in Flushing Meadow, New York.  Tim graduated from the academy in 1985 and went on to play for coach Mike DePalmer at the University of Tennessee.  During his college career, Tim won two Southeastern Conference Singles titles and his team won the SEC team title once.  He lettered all four years at Tennessee and was team captain his senior year.

Tim played tennis professionally in the U.S. and Europe for two years and returned to graduate from the University of Tennessee in 1993.  He then returned to Tulsa and started his teaching career at Tulsa Southern for a brief period before moving to Philcrest Hills Tennis Club for 17 years.  In 2015 Tim was hired as the head pro at The Case Tennis Center at LaFortune Park in Tulsa. 

Tim has played on many Menís and Mixed USTA teams.  He has been to the Mixed Nationals four times with his wife, Sandy, as his partner and won Nationals in the 40 and over mixed doubles in 2018.  He has been selected several times to represent the United States in the Gordon Trophy Cup annual international tennis competition with Canada. 

Tim and Sandy were married in 2006.  He has four children:  Taylor, Lindsey, and Carson Howard, and Quinn Leos.  Tim continues to play and teach tennis with his focus on promoting tennis for both adults and juniors at all levels of play.