Paul Hunter Classic 2015
|Born||9 September 1988|
Mynydd Isa, Flintshire
|Highest ranking||86 (June 2016)|
|Highest||127 (2014 Gdynia Open)|
|Best ranking finish||Last 64 (2013 Welsh Open, 2016 Riga Masters, 2016 Scottish Open, 2017 China Open)|
Allen started playing snooker aged three, joining his local snooker club and playing on full sized table at twelve. In a lengthy amateur career, Allen made his debut for the Welsh international side aged eighteen, where he reached the last 16 of the 2010 Amateur World Snooker Championship and narrowly missed out on a professional tour card in 2013, where he lost in the final to Robin Hull in the EBSA European Snooker Championships. He was also a regular competitor in Players Tour Championship events, where in the professional rounds he beat pros such as Kurt Maflin, Alfie Burden, Andrew Norman, Joel Walker and Nigel Bond.
He was also a regular competitor in the end of season Q School events since their introduction and in 2012 he lost in a quarter-final match against Paul Davison, which would have gained him pro tour status had he won. However, his run did enable him to feature in several ranking events during the 2012/2013 season, with the highlight being a win over then top 32 player Rory McLeod 4–2 in qualifying in his home event the 2013 Welsh Open. His next match against John Higgins was televised, which he lost 4–1.
In 2015, Allen was successful in Q School and earned a tour card for the 2015/2016 and 2016/2017 seasons by beating Alex Taubman 4–2 in his final match of Event 2. He won his first match as a professional by beating Adam Edge 5–3 in Australian Goldfields Open qualifying, but lost 5–1 to Jamie Burnett in the second round. Allen saw off Barry Pinches and Aditya Mehta both 5–1 in the qualifying rounds for the Shanghai Masters, before losing by a reversal of this scoreline to Li Hang. He made his debut at the venue stage of a ranking event in York for the UK Championship and was defeated 6–1 by Liang Wenbo. Allen then lost 15 successive matches from August 2015 until the start of the 2016/2017 season, when he beat Kurt Maflin 4–3 to qualify for the Riga Masters. Allen won a match at the venue stage of a ranking event for the first time by edging past Ross Muir 4–3 in the opening round of the Scottish Open and then lost 4–3 to Mike Dunn. A 5–4 win over Robin Hull saw him qualify for the China Open, where he was beaten 5–0 by Ronnie O'Sullivan in the opening round. Allen fell off the tour at the end of the season as he was placed 110th in the world rankings. Following his relegation from the tour, Allen announced his retirement from the game and started coaching after gaining his coaching qualification through the WPBSA. 
Performance and rankings timeline
|Ranking[nb 1]||[nb 2]||[nb 2]||[nb 2]||[nb 2]||[nb 2]||[nb 3]||112|
|Riga Masters[nb 4]||Tournament Not Held||Minor-Rank.||1R|
|Indian Open||Not Held||A||A||NH||LQ|
|World Open||A||A||LQ||A||Not Held||LQ|
|Paul Hunter Classic||Minor-Ranking Event||1R|
|European Masters||Tournament Not Held||LQ|
|English Open||Tournament Not Held||1R|
|International Championship||Not Held||LQ||A||A||LQ||LQ|
|Northern Ireland Open||Tournament Not Held||1R|
|Scottish Open||Not Held||MR||Tournament Not Held||2R|
|World Grand Prix||Tournament Not Held||NR||DNQ||DNQ|
|Gibraltar Open||Tournament Not Held||MR||1R|
|Players Championship[nb 5]||DNQ||DNQ||DNQ||DNQ||DNQ||DNQ||DNQ|
|Variant format tournaments|
|Six-red World Championship[nb 6]||A||NH||A||A||RR||A||A|
|Former ranking tournaments|
|Australian Goldfields Open||NH||A||A||A||A||LQ||NH|
|Performance Table Legend|
|LQ||lost in the qualifying draw||#R||lost in the early rounds of the tournament
(WR = Wildcard round, RR = Round robin)
|QF||lost in the quarter-finals|
|SF||lost in the semi-finals||F||lost in the final||W||won the tournament|
|DNQ||did not qualify for the tournament||A||did not participate in the tournament||WD||withdrew from the tournament|
|NH / Not Held||means an event was not held.|
|NR / Non-Ranking Event||means an event is/was no longer a ranking event.|
|R / Ranking Event||means an event is/was a ranking event.|
|MR / Minor-Ranking Event||means an event is/was a minor-ranking event.|
- It shows the ranking at the beginning of the season.
- He was an amateur.
- New players on the Main Tour don't have a ranking.
- The event was called the Riga Open (2014/2015–2015/2016)
- The event was called the Players Tour Championship Grand Finals (2010/2011–2015/2016)
- The event was called the Six-red Snooker International (2008/2009)
Amateur finals: 2 (2 runner-ups)
|Outcome||No.||Year||Championship||Opponent in the final||Score|
|Runner-up||1.||2010||Welsh Amateur Championship||Andrew Pagett||0–8|
|Runner-up||2.||2013||European Amateur Championships||Robin Hull||2–7|
- "WORLD RANKINGS After 2016 Kaspersky Riga Masters". World Snooker. Retrieved 1 July 2016.
- "Career-total Statistics for Gareth Allen - Professional". CueTracker Snooker Results & Statistics Database. Retrieved 28 May 2015.
- "Gareth Allen". Pro Snooker Blog. Retrieved 28 May 2015.
- "2012 Q School - Event 2". CueTracker Snooker Results & Statistics Database. Retrieved 28 May 2015.
- "Gareth Allen". Gareth Allen. Retrieved 28 May 2015.
- "Q School Event Two Winners". World Snooker. 28 May 2015.
- "Gareth Allen 2015/2016". Snooker.org. Retrieved 7 April 2016.
- "Gareth Allen 2016/2017". Snooker.org. Retrieved 19 August 2016.
- "Gareth Allen 2016/2017". Snooker.org. Retrieved 16 March 2017.
- "Ronnie O'Sullivan flies into second round in China". Eurosport. Retrieved 11 April 2017.
- "Rankings 2016/2017". Snooker.org. Retrieved 7 May 2017.
- "Ranking History". Snooker.org. Retrieved 6 February 2011.
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