Began his career in West Bromwich Albion's youth system and later joined Millwall in 2011. Allsop gained first-team experience with Icelandic club Höttur and Leyton Orient before signing with AFC Bournemouth in 2013. During his time at Bournemouth, he was loaned out 5 times. He subsequently played for Wycombe Wanderers, and a season each at Derby County, Cardiff City, and Hull City before joining Birmingham City in 2024.
Penalties faced (5)
2014-15
9 August 2014 v Bradford City A, League One, scored - Alan Sheehan
20 September 2014 v Rochdale A, League One, scored - Ian Henderson
27 September 2014 v Preston North End H, League One, scored - Joe Garner
12 January 2015 v Swindon Town H, League One, scored - Andy Williams
17 January 2015 v Gillingham A, League One, scored - Cody McDonald
EFL Trophy winner 2017-18 with Lincoln City.
5 caps for England U17 with West Bromwich Albion

