Eden made his senior début for Castleford against the Warrington Wolves on 1 July 2011, scoring and assisting a try.
Huddersfield Giants
Eden signed for the Huddersfield Giants from the Castleford Tigers in the winter of 2011 and made an immediate impact in the Super League, establishing himself as first choice at the Huddersfield Giants within weeks of the season beginning. He was rewarded with a long term deal until the end of the 2015 season.
Hull Kingston Rovers
Eden moved to Hull Kingston Rovers in the winter of 2012, signing a three-year deal. He made 39 appearances for the club across 2 seasons, scoring 24 tries.
Salford Red Devils (loan)
On 25 April 2014, Greg Eden joined the Salford Red Devils on a 1-month loan deal. In May, this was subsequently extended on a week-by-week basis, with Hull KR able to recall him at any chosen period. The Robins exercised this right in June following a serious injury to fullback Ben Cockayne.
Eden made 2 appearances for Gateshead in 2014, through their dual-registration arrangement with Hull KR.
Brisbane Broncos
On 1 September 2014, Eden signed with Brisbane Broncos, boosting their ranks after the Broncos showed great interest in him. In February 2016, Eden returned to the UK to play in the World Club Series against the Wigan Warriors, scoring a try for the Broncos.
Castleford Tigers
In June 2016 Eden agreed upon a 2-year contract with hometown Super League side Castleford Tigers for the upcoming season starting in 2017. Eden was given the squad number 5 prior to the start of the season, and played the majority of matches on Castleford's left wing. He scored 38 Super League tries in his first season back at Castleford, including 5 hat-tricks against Leeds twice, Widnes, Leigh and Warrington. Eden topped the try scoring charts and was named in the Super League Dream Team for this season. He played at fullback in the 2017 Super League Grand Final defeat by the Leeds Rhinos at Old Trafford, after Zak Hardaker was suspended two days before the game following a failed drugs test. Eden's excellent strike rate for the Tigers was rewarded with a three-year contract extension in 2018. However, his season was limited to just 15 appearances following a hamstring injury. Despite this, he still scored 18 tries. In the first match of 2020, Eden scored a trademark length-of-the-field try against Toronto Wolfpack, before hyper extending his knee in the second half.
Castleford's most tries scored in a match record is 5-tries, and is jointly held by; Derek Foster against Hunslet on 10 November 1972, John Joyner against Millom on 16 September 1973, Stephen Fenton against Dewsbury on 27 January 1978, Ian French against Hunslet on 9 February 1986, St. John Ellis against Whitehaven on 10 December 1989, and Greg Eden against Warrington on 11 June 2017. Eden became the first player to achieve this for Castleford in the Super League era. Eden's 41 tries for Castleford in 2017 places him second for the most tries scored in a single season for Castleford, behind Denny Solomona's 42 in 2016, ahead of St. John Ellis' 40 in 1993-94. Eden's 38 Super League tries in 2017 places him second for the most tries scored in a single Super League season, behind Denny Solomona's 40 in 2016, ahead of Lesley Vainikolo's 36 in 2004. Eden holds the record for fastest hat-trick in rugby league history; his treble against Leigh on 29 May 2017 took just 4 minutes 59 seconds, beating Shaun Johnson's record 6 minutes 30 seconds for the New Zealand Warriors against the Canberra Raiders in 2013. Eden is believed to hold the record for the most consecutive hat-tricks; in 2017, he scored trebles in 4 successive matches, which is believed to be a first in the professional game.
