Tottenham Hotspur Beginnings Mason joined the
Tottenham Hotspur academy aged eight, before signing a professional contract with the club in August 2008. He made his first-team debut in the group stages of the
UEFA Cup on 27 November 2008, coming on as an added-time
substitute for
David Bentley in a 1–0 away win against Dutch club
NEC. During the 2008–09 season he topped the Academy scoring sheets with 29 goals in 31 matches as Spurs finished runners-up in the
Premier Academy League.
Loans On 13 June 2009, Mason went on loan to
League One club
Yeovil Town, along with teammate
Steven Caulker. He made his league debut on 8 August in their first match of the 2009–10 season, a 2–0 win against
Tranmere Rovers at
Huish Park. Mason made a promising start to his time at Yeovil, scoring from a free kick in his second match against
Colchester United albeit in a 1–2 away defeat, and from a long-range strike in their next match against
Exeter City to earn an away draw. The goal against Exeter was included in BBC Sport's "Goals of the Week". According to the Spurs website, "after impressing for
Terry Skiverton's men at the start of the 2009–10 season, the loan deal was extended for a further three months". Along with fellow Tottenham loanees, Caulker and
Jonathan Obika, on 5 November 2009, Mason's loan was extended until May 2010. He was recalled prematurely, on 13 March 2010, after playing 28 league matches and scoring six goals for Yeovil. in 2010 In August 2010, Mason was loaned for the first time to
Championship team
Doncaster Rovers on a two-month loan deal, and made five appearances. and made a further ten appearances. Mason was recalled back to Tottenham in November 2011 after making five appearances since the start of the season. On 29 December 2011, Mason and teammate
Harry Kane agreed a loan deal with Championship club
Millwall from 1 January until the end of the season. Mason made an appearance in Tottenham's goalless draw in the Europa League group stages against
Lazio at
White Hart Lane on 20 September 2012, coming on as an added-time substitute for
Mousa Dembélé. He made his first Tottenham start six days later in a League Cup last 32 match against
Carlisle United, a 3–0 away win. On the last day of the winter transfer window, Mason joined
Ligue 1 club
Lorient on loan for the remainder of the 2012–13 season, making his move out of England for the first time. It was terminated in April 2013 with Mason having failed to make a senior appearance. On 23 July 2013, Mason signed on a season-long loan for League One
Swindon Town, joining fellow Tottenham players
Massimo Luongo,
Grant Hall and
Alex Pritchard. On 31 August, he scored a hat trick against
Crewe Alexandra in a 5–0 win.
2014–15 season After a successful pre-season in the United States with Spurs, Mason was included in
Mauricio Pochettino's Premier League squad. On 24 September 2014, he made his first appearance of the season as well as scoring his first goal for Tottenham, an equaliser in a League Cup fixture against
Nottingham Forest, which Spurs went on to win 3–1. Later that week, on 27 September 2014, he made his Premier League debut for Spurs in a 1–1 draw away at
Arsenal. Mason subsequently established himself as a regular member of the first team. The incident led to both clubs being fined £20,000 by
The Football Association (FA) for failing to keep their players under control. In January 2015, Mason was awarded a five-and-a-half-year contract, keeping him at the club until 2020. He started in the
2015 League Cup Final at
Wembley Stadium on 1 March, in which Tottenham were beaten 2–0 by
Chelsea. Mason scored his first Premier League goal, Tottenham's second of the match, in a 3–2 win against
Swansea City.
2015–16 season On 13 September 2015, Mason scored his second league goal for Spurs, an 82nd-minute winner in a
man of the match performance which came in a 1–0 victory over
Sunderland. In scoring the goal, however, he received an injury that ruled him out for several matches. He made his comeback from injury as a substitute in Spurs' 5–1 win against
Bournemouth. On 18 February 2016, Mason captained the team against
Fiorentina in a 1–1 draw in the
UEFA Europa League. He then scored in a 3–0 win in the second leg, his second goal of the season.
Hull City and retirement in 2016 After a disappointing 2015–16 campaign with only eight league starts, Mason was bought by
Hull City on 30 August 2016, for a fee believed to be around £13 million, a club record. He made his debut away to
Burnley when he came off the bench to replace
David Meyler after 73 minutes. He scored his first goal for Hull in a 2–1
EFL Cup win over
Stoke City on 21 September 2016. On 22 January 2017, in a Premier League match against Chelsea, Mason suffered a fractured skull that required surgery after a clash of heads with defender
Gary Cahill. Mason underwent a successful operation on the head injury, and throughout the rest of 2017 went through a rehabilitation process in an attempt to return to playing. After the operation he had 14 metal plates in his skull, with 28 screws holding them in place. He also had 45 staples and a six-inch scar across his head. On 13 February 2018, it was confirmed that due to risks associated with the extent of Mason's injury, he would be retiring from professional football. Since his retirement through injury, Mason has called for
the Football Association to ban children from heading regulation-weight footballs, and for players to be protected from the risks of concussion. ==International career==