Baker made his professional debut on 6 September 2003, stopping Dave Clarke in the first round. The highlight of Baker's career was competing in the heavyweight edition of the Prizefighter series on 2 October 2009. He entered the tournament as an outsider, but defeated one of the favourites—Danny Williams—by unanimous decision (UD) in the opening round, while also scoring two knockdowns against Williams in the first round of their fight.[1] In the semi-final, Baker was eliminated after losing a UD to Coleman Barrett.
| No.|Number | Result | Record | Opponent | Type | Round, time | Date | Location | Notes |
|---|
| 18 | {{no2}}Loss | 10–8 | {{flagicon|USA}} Eddie Chambers | RTD|Corner retirement}} | 3:00}} | 17 May 2014 | {{flagicon|UK}} {{small|Town Hall, Leeds, England}} |
| 17 | {{yes2}}Win | 10–7 | {{flagicon|LIT}} Paulius Kasiulevicius | TKO | 2:46}} | 18 Oct 2013 | {{flagicon|UK}} {{small|York Hall, London, England}} |
| 16 | {{no2}}Loss | 9–7 | {{flagicon|UK}} Carl Spencer | PTS | 6 | 21 Sep 2013 | {{flagicon|UK}} {{small|Octagon Centre, Sheffield, England}} |
| 15 | {{no2}}Loss | 9–6 | {{flagicon|GER}} Edmund Gerber | TKO | 1:44}} | 7 May 2011 | {{flagicon|GER}} {{small|Jahnsportforum, Neubrandenburg, Germany}} |
| 14 | {{no2}}Loss | 9–5 | {{flagicon|UK}} Dereck Chisora | TKO | 2:13}} | 13 Feb 2010 | {{flagicon|UK}} {{small|Wembley Arena, London, England}} |
| 13 | {{no2}}Loss | 9–4 | {{flagicon|IRE}} Coleman Barrett | UD | 3 | 2 Oct 2009 | {{flagicon|UK}} {{small|ExCeL, London, England}} | {{small|Prizefighter 8: heavyweight semi-final}} |
| 12 | {{yes2}}Win | 9–3 | {{flagicon|UK}} Danny Williams | UD|Unanimous decision}} | 3 | 2 Oct 2009 | {{flagicon|UK}} {{small|ExCeL, London, England}} | {{small|Prizefighter 8: heavyweight quarter-final}} |
| 11 | {{yes2}}Win | 8–3 | {{flagicon|UK}} Chris Woollas | PTS | 6 | 9 May 2009 | {{flagicon|UK}} {{small|Showground, Lincoln, England}} |
| 10 | {{yes2}}Win | 7–3 | {{flagicon|UK}} David Ingleby | TKO | 0:40}} | 13 May 2006 | {{flagicon|UK}} {{small|Ponds Forge, Sheffield, England}} |
| 9 | {{yes2}}Win | 6–3 | {{flagicon|UK}} Luke Simpkin | PTS | 10 | 11 Sep 2005 | {{flagicon|UK}} {{small|Festival Hall Leisure Centre, Kirkby in Ashfield, England}} | {{small|Retained British Masters heavyweight title}} |
| 8 | {{yes2}}Win | 5–3 | {{flagicon|UK}} Scott Lansdowne | TKO | 0:34}} | 25 Jun 2005 | {{flagicon|UK}} {{small|Cattle Market, Melton Mowbray, England}} | {{small|Won vacant British Masters heavyweight title}} |
| 7 | {{no2}}Loss | 4–3 | {{flagicon|UK}} Luke Simpkin | TKO | 1:58}} | 26 Apr 2005 | {{flagicon|UK}} {{small|Elland Road Banqueting Suite, Leeds, England}} |
| 6 | {{yes2}}Win | 4–2 | {{flagicon|UK}} Paul King | TKO | 1:17}} | 4 Mar 2005 | {{flagicon|UK}} {{small|Magna Science Adventure Centre, Rotherham, England}} |
| 5 | {{no2}}Loss | 3–2 | {{flagicon|UK}} Scott Gammer | PTS | 4 | 17 Sep 2004 | {{flagicon|UK}} {{small|Pavilions, Plymouth, England}} |
| 4 | {{no2}}Loss | 3–1 | {{flagicon|UK}} Paul King | PTS|Points decision}} | 6 | 3 Apr 2004 | {{flagicon|UK}} {{small|Waltheof Sports Centre, Sheffield, England}} |
| 3 | {{yes2}}Win | 3–0 | {{flagicon|UK}} Alvin Miller | KO|Knockout}} | 0:40}} | 28 Nov 2003 | {{flagicon|UK}} {{small|Sports Arena, Hull, England}} |
| 2 | {{yes2}}Win | 2–0 | {{flagicon|UK}} Billy Wilson | TKO | 1:35}} | 15 Sep 2003 | {{flagicon|UK}} {{small|Queens Hotel, Leeds, England}} |
| 1 | {{yes2}}Win | 1–0 | {{flagicon|UK}} Dave Clarke | TKO|Technical knockout}} | 1 (6) | 6 Sep 2003 | {{flagicon|UK}} {{small|Beach Ballroom, Aberdeen, Scotland}} |
1. ^Mitchell, Kevin (5 October 2009). [https://www.theguardian.com/sport/blog/2009/oct/05/danny-williams-prizefighter-audley-harrison "Hard not to feel sorry for Danny Williams after Prizefighter wipeout"]. The Guardian. Guardian Media Group. Retrieved 3 June 2017.