In his first season with the Knights in 2017, Roddick guided the Black and Gold to a 16-7 record, including a 12-3 mark at home. UCF took down four ranked teams, including No. 23 Texas Tech in Roddick's first match in charge. The Knights earned an at-large bid to the NCAA Tournament, their first appearance since 2005. Korey Lovett was named First Team All-AAC. Lovett also became the first player in program history to be selected for the NCAA Men's Tennis Singles Tournament. UCF finished the year ranked No. 33 in the Oracle/ITA National Rankings.

Roddick joined the Knights after seven successful seasons as the head men's tennis coach at the University of Oklahoma. He led the Sooners to their third consecutive NCAA Division I runner-up finish in May 2016, and was named the Intercollegiate Tennis Association (ITA) National Coach of the Year in 2014. He is also a two-time ITA Central Region Coach of the Year and a four-time Big 12 Conference Coach of the Year.

Under Roddick's guidance, the Oklahoma men's tennis team earned its first Big 12 Conference championship (2012), its first ITA No. 1 weekly ranking (2014) and the program's first-ever No. 1 overall seed for the NCAA Division I Team Championship (2015). Roddick compiled a 146-48 record with the Sooners.

Prior to his tenure at Oklahoma, Roddick served as the ATP Tour Coach for his brother Andy Roddick. During that time, Andy defeated the top three players in the world in a six-week span. From 2002-09, he also served as Director of Roddick Total Tennis, a high-performance boarding academy in San Antonio and Austin, Texas. He also mentored top touring professionals such as his brother, Mardy Fish and Uladzimir Ignatik. In 2006 and 2008, Roddick served as Team Captain for the United States' World Team Cup squad.

Roddick's first collegiate coaching jobs were as assistants at Florida State (1999-2000) and Georgia (2000-02). During his two-year stint with Georgia, the Bulldogs won the national championship (2001) and finished as runners-up (2002).

Born in Omaha, Neb., Roddick and his brothers Lawrence and Andy, grew into promising players. John earned All-America honors four times at Georgia and was named the UGA Athlete of the Year in 1998. He proved his prowess in the classroom as well, earning three SEC All-Academic Team selections. Prior to his collegiate playing days, Roddick was a top junior. He qualified for the 1993 and 1994 U.S. National Teams as his player rating climbed as high as No. 6 in the world in singles and No. 3 in doubles.