After competing at the highest level on the ITF junior circuit, Jason Goodall ranked as high as British No. 2 as a professional. He was part of Great Britain's Davis Cup team in 1989 for two ties, away to Finland which Britain won 4-1 and at home against Argentina, which the hosts lost 3-2.

Goodall retired at the age of 21 due to a chronic elbow injury and turned to coaching, working initially with 21-times Grand Slam doubles champion Pam Shriver. While doing so, she made the 1989 US Open doubles final with Mary Joe Fernandez, only to lose to Martina Navratilova and Hana Mandlikova. Then he worked with former World No. 4 Fernandez and was coaching her when she made the 1990 Australian Open singles and doubles finals. Fernandez was beaten by Steffi Graff in the singles and then she teamed up with American Patty Fendick in doubles, losing to top seeds Jana Novotna and Helena Sukova in the final.

He then worked with a number of other players on the WTA tour including former World No. 25 Betsy Nagelson and former world No.1s Arantxa Sanchez-Vicario and Jennifer Capriati as both coach and hitting partner before taking a position as International Squad Coach at the Lawn Tennis Association in London. As a fully qualified coach, he then worked with the best male and female juniors in the UK and oversaw their transition from the junior game to professional tours. Later, he was appointed Great Britain Fed Cup coach in 1995.

He also worked with former World No. 4 Tim Henman during the off-seasons at various stages throughout Henman's career, and also travelled as his coach when his regular coach, David Felgate, was unavailable.

In 2000 Goodall then started to pursue off-court work and began television commentary, writing and producing at various tennis events around the world and continues to do so. He has had articles published in various newspapers including The Times and the Wall Street Journal, and currently commentates for a number of broadcasters including the BBC, International Eurosport, the Tennis Channel and Al Jazeera along with work for both the ATP and WTA Tours at various events throughout the tennis season.

He is well known as a lead commentator, also known as the play-by-play commentator in North America, but he is also well-respected within the game as a colour commentator too or in the role of analyst, where his area of expertise is technical and tactical analysis, often using Hawk-Eye as a tool with which to enlighten viewers as to what might prove crucial in determining the outcome of matches.