Daniels is product of the Manchester United and West Bromwich Albion academies and played much of the early years of his career away on loan from the latter club.

[5] The departure of second-choice goalkeeper Russell Hoult in January 2007 led to Daniels being temporarily promoted onto the substitutes' bench for the majority of the remaining matches of the 2006–07 season.

[12] He made more than 40 appearances for both clubs and reached the 2008 League Two play-off final with Shrewsbury Town,[13][14] which was lost 3–2 to Stockport County.

[9] Daniels spent much of the 2010–11 season away on loan at League One clubs Bristol Rovers (two spells),[16][17] Charlton Athletic and Rochdale.

[4][18][19] Daniels was called into a West Bromwich Albion matchday squad for the first time in nearly four years for two League Cup matches early in the 2011–12 season, but remained an unused substitute in both.

[5] Daniels received his first call up of the 2013–14 season onto the bench for a Premier League match versus Everton and he made his long-awaited Baggies debut as a 77th-minute substitute for the injured Ben Foster and helped the team to a 0–0 draw.

[24][25] He made his first start for the club in the following game, keeping another clean sheet in a 3–0 League Cup second round victory over Newport County.

[26] The injury to Ben Foster allowed Daniels to continue as second-choice goalkeeper behind Boaz Myhill until 14 December 2013, when he received his final first team call up of the 2013–14 season.

[28] On 24 May 2017, Daniels joined Championship club Brentford on a free transfer and signed a three-year contract, with an option for a further year, effective 1 July 2017.

[34] Daniels appeared in each of the club's four cup matches during the 2017–18 season and made his league debut versus Hull City on the final day, in which he helped preserve a 1–1 draw by saving a second-half penalty.

[3] A season-ending shoulder injury suffered by Bentley in March 2019 allowed Daniels a run in the team in league matches and he finished the season with 19 appearances in all competitions.

[53][54] On 14 July 2023, Daniels signed a one-year contract with League Two club Forest Green Rovers on a free transfer.