He is a specialist right-arm fast-medium bowler who currently plays for Victoria in first-class and List A cricket, and for Melbourne Stars in the Big Bash League.

Early in Siddle's career he faced injury problems, but he overcame them in 2009 to be named the ICC Emerging Player of the Year.

Siddle became a vegan in 2012, subsequently receiving criticism that suggested his diet had a negative effect on his performance, which he disputed.

[10] His first ball was a bouncer which hit Indian batsman Gautam Gambhir in the head[1][6] and his maiden Test wicket was that of Sachin Tendulkar.

[1] He broke through with three wickets in front of his home crowd at the Melbourne Cricket Ground during the Boxing Day Test Match against the Proteas on his way to figures of four for 81 in the first innings.

[11] Siddle backed this performance up in the next Test at the Sydney Cricket Ground, taking five for 59 in South Africa's first innings.

The fact that it had come in six Tests against the South Africans and one in India, with an economy rate of only 2.57 an over, helped make his record look even more impressive.

[18] When England had reached 4/197, Siddle was brought back into the attack and took the wickets of Alastair Cook and Matt Prior in consecutive balls to be on a hat-trick.

[18] Siddle went on to dismiss Graeme Swann for his sixth wicket of the innings and almost took a seventh when wicket-keeper Brad Haddin dropped James Anderson off his bowling.

[18] He finished with figures of six wickets for just 54 runs, his best-ever in Test match cricket, having bowled 16 overs in total.

[1] Siddle had signed for English county Essex for the 2012 Friends Life t20, England's premier Twenty20 competition,[27] but due to his injury he was unable to fulfill his contract with the club.

Australia needed to bowl South Africa out in the final two days of the Test match to avoid a second consecutive draw and Siddle was the most successful Australian bowler with four wickets.

Whilst showing clear signs of exhaustion throughout the final day, Siddle pushed through and took wickets late in the match but was unable to get Australia the win.

[42] Siddle became a victim of the Australian selectors' changing policy, focusing more on outright pace than consistent line and length, resulting in him being dropped from the team when he started to lose some of his bowling speed in early 2014.

[45] No longer a regular part of the Test team, Siddle lost his contract with Cricket Australia in early 2015.

[48] Siddle started to make a comeback to Test cricket in 2015, being brought into Australia's team for the 2015 Ashes series.

[49][52][54] During this summer, the Australian selectors worked on reshaping their bowling attack by focusing more on youth and outright pace, which left Siddle off of their radar moving forwards.

[54][56] He played every game for Victoria in the 2017–18 JLT One-Day Cup, including an impressive 2/20 performance against the Cricket Australia XI at the tiny Hurstville Oval, a difficult ground to bowl at due to its short boundaries.

[54][55][56] He then played four of Victoria's first five matches in the 2017–18 Sheffield Shield season, but he only took four wickets and was not included in Australia's squad for the Ashes.

[1][49] Siddle is a Test cricket specialist, bowling with great consistency over long periods of time, worrying aggressive batsmen like Kevin Pietersen.

[1][42][49] Though he did have a brief stint in Australia's limited overs team, issues with his playing style made it difficult for him to make the same mark that he has had in Test cricket.

His consistent line and length was easy for batsmen to predict in One Day Internationals and he did not have enough variations in his bowling to succeed in Twenty20s.

[1] After becoming a vegan, Siddle faced criticism that his change of diet led to fatigue and slower bowling speeds.