Mann first played snooker aged 9,[2] after being forced to quit football after a diagnosis of Legg–Calvé–Perthes syndrome, a rare disease which rots the hip bone in young boys.

[7] For 2010–11, the PIOS was dropped and replaced by the pro-am Players Tour Championship and an end-of season Q School[8] became the new pro ticket events.

In the PTC events, Mann managed several wins against professional players Liang Wenbo, Michael White, Dave Harold and Shaun Murphy notable casualties.

[3] This performance however, enabled Mann to be a top up player for 2012 Australian Goldfields Open professional ranking event, where he reached the third round last 64 stage.

[15] Mann saw off Alfie Burden 10–4 in World Championship qualifying and won three frames in a row, after Gerard Greene had come from 4–0 down to trail 7–6, to beat him 10–6.

[19] At the final European Tour event, the Gdynia Open, Mann eliminated Sanderson Lam 4–3, Rhys Clark 4–3 (having been 3–0 down) and Jack Lisowski 4–2 to reach the last 16 where he lost 4–1 to Marco Fu.

Mann reached the last 32 of an event for the third time this season when he overcame Michael Holt 4–1 and O'Sullivan 4–2 at the Welsh Open and he was defeated 4–2 by Kurt Maflin.