Date of birth
Durham born Armstrong signed from Salford City in June 2021, having spent the last season on loan at Hartlepool United where he earned promotion to The Football League.
Armstrong spent time at Middlesbrough and Birmingham as a youngster and then moved onto Blyth Spartans where he scored 23 goals in 42 appearances.
The striker then rejoined Boro and spent time on loan at Gateshead and League One side Accrington Stanley before signing permanently for Salford City in 2019.
Halfway through the 2020/21 season, Armstrong joined Hartlepool United on loan and scored 13 times in less than 30 appearances.