Samuel Colin Walker (born 2 October 1991) is an English professional footballer who plays as a goalkeeper for EFL League Two club Bradford City.

[citation needed] He joined Norwich City on a youth loan in March 2009, playing for the under-19s to cover an international call-up for Jed Steer and an injury to Declan Rudd.

[9] However, on the final day of the season, with other results working in their favour, Barnet remained a Football League side as Walker kept his first clean sheet in a 1–0 victory over Port Vale.

[11] Northampton Town boss Gary Johnson signed Walker on a season-long loan from Chelsea on 11 July 2011 following his successful stint at Barnet.

[16] Walker made the step up to League One football in 2012, signing on loan with Yeovil Town on 19 January until the end of the season, once again teaming up with Gary Johnson.

[18] With the club struggling near the relegation zone, Walker put in some impressive performances, including a penalty save against Milton Keynes Dons as the Glovers went on to record a 1–0 victory and in turn boost their hopes of survival.

[25] Walker made 14 appearances at the Memorial Stadium,[26] but failed to establish himself as a regular, with fellow loanee and former Chelsea trainee Neil Etheridge becoming first choice goalkeeper for the League Two side.

[37] In December 2013, with his contract expiring at the end of the season, Walker announced he needed to discuss his future with Chelsea before deciding whether to extend his loan spell at Colchester or pay attention to interest from elsewhere.

[38] Walker then played the final game of his loan spell away at Carlisle on 18 December, spilling a late free kick to concede a goal, although the U's went on to win 4–2.

[41] Owing to a string of postponed games due to waterlogged pitches, Walker's first appearance as a full-time U's player didn't arrive until 11 February, when Colchester lost 2–0 at Port Vale.

[50] On 23 December 2020, Walker joined League One side Blackpool on an emergency one-week loan after their first-team goalkeeper Chris Maxwell tested positive for Coronavirus.