Sellers started his career with Wingate & Finchley, joining aged 13[2] before a six-month spell at Barnet before eventually returning to Wingate & Finchley towards the conclusion of the 2012–13 campaign, in which he subsequently broke into the first-team.[3] He also enjoyed a brief loan spell with London Lions during his second stint back at Wingate.[4] In November 2013, Sellers was one of six youngsters chosen to win a place at the famed Nike Academy,[5] where he spent the remainder of the 2013–14 campaign before earning a move to Football League side, Bolton Wanderers in July 2014.
Sellers joined League Two side Wycombe Wanderers in June 2015.[6] He made his professional debut on 8 August 2015 in a 3–0 victory against York City.[7] On 9 May 2016, it was announced that Sellers would leave the club upon the expiry of his contract on 30 June 2016.[8]
In August 2016, after trials with numerous National League sides including Woking, Sellers re-joined his boyhood club Wingate & Finchley.[9] On 13 August 2016, Sellers made his Wingate & Finchley return in a 3–0 away defeat against Tonbridge Angels, featuring for the full 90 minutes.[10]
On 23 February 2017, Sellers joined National League South side Wealdstone.[11] After an eighteen-month spell with Wealdstone, Sellers agreed to join National League side Halifax Town on a one-year deal in July 2018.[12] In May 2019, Sellers returned to Wealdstone.[13]
Following a spell back at Wealdstone, Sellers subsequently went onto feature for Hemel Hempstead Town, a return to Wingate & Finchley[14] and London Colney.[15] Sellers returned to Wingate & Finchley for the fourth time in October 2022.[16]