Born in Newcastle, New South Wales, Doyle made his British speedway debut in March 2005 for Premier League team the Isle of Wight Islanders.

[3] During the 2008 season Doyle finished as runner up in the Premier League Pairs Championship with Emil Kramer and represented Australia at Under-23 Test level.

[5] In the 2013 season Doyle signed for the Birmingham Brummies, who reached the Elite League play-off final, losing to Poole Pirates.

In the "A" Final of the last round at the Gillman Speedway, Doyle fell and was excluded from the re-run and with Holder finishing second he was able to win his 5th national crown.

Many judges believed he came of age in the 2014 Final at the Polonia Bydgoszcz Stadium, winning four of his six rides and being the second highest scorer on the night with 13 behind Denmark's triple world champion Nicki Pedersen.

He finished off the year qualifying for the final at home in Australia, but a crash in the first turn with American Greg Hancock resulted in a short stay in hospital after suffering neck and chest injuries.

On 25 June 2016, Doyle won his first ever SGP when he took out the Speedway Grand Prix of Czech Republic at the Markéta Stadium in Prague.

He would bounce back however in 2017, going on to clinch the world title after dominating the Speedway Grand Prix series, despite riding with a broken foot for much of the season, winning the Czech Republic and Australian rounds.

[27] Doyle started the 2024 season well, proving almost unbeatable for Ipswich and winning the 2024 Speedway Grand Prix of Poland but then crashed heavily in a league match and broke four ribs and suffered a lung contusion.