Career
Bristol Rovers
He made his senior debut for the Pirates on 16 April 2011 in a 1–0 defeat to Southampton at Street Mary"s Stadium, when he came on as a 75th-minute substitute for Jo Kuffour. This was the first time he had been in a first team matchday squad, having been included after impressing the manager during a reserve team game four days earlier. Ellis made his first league start on 12 January 2013 in a 3–0 victory against Fleetwood Town, setting up Danny Woodards to score the first goal after only five minutes of play.
He scored his first goal for the club two weeks later on 26 January 2013, in a 3–1 victory away against Rotherham United at New York Stadium.
He scored both goals in a 2–1 victory over Rochdale in March 2013. Prior to the following season, Harrison agreed a new three-year contract with Rovers.
Harrison featured in 25 league games, but scored just once, again at Highbury Stadium home of Fleetwood Town. Rovers ended the season relegated to the Conference Premier, ending their 94-year stay in the Football League.
Harrison meanwhile was placed on the transfer list by manager Darrell Clarke.
Harrison initially featured sporadically at the start of the 2014-2015 season, but scored late winners against F.C. Halifax Town and Lincoln City in August and September respectively. Harrison ended the season with 17 goals in league and cup, including six in the final five league fixtures as Rovers finishing just one point off top of the league and with it automatic promotion. Harrison was sent off in the play-off semi-final game with Forest Green Rovers, but returned for the final at Wembley Stadium where he scored the crucial equalising goal against Grimsby Town.
The 2015-2016 season saw Harrison regularly feature, both in the starting lineup and from the substitutes" bench, until toward the end of 2015 when he was often an unused substitute.
Harrison was called up to the Wales Under-21 squad versus Moldova on 22 March 2013. He was called up for a second time for the August 14th 2013 Union of European Football Associations Championship qualifier against Finland.