Date of birth
Another graduate from the club's academy, midfielder Brownell signed his first professional contract with the Spireites in April 2017.
Like his colleagues Joe Rowley and Charlie Wakefield, a series of impressive displays for both the reserve and youth teams saw him included in Gary Caldwell's first team squad in the latter part of the 2016/17 season.
Brownell made his debut during the final home game of the season against Charlton Atheltic where he appeared as a substitute.
The midfielder has been with the club since U14 level, having previously spent time with Sheffield Wednesday.
Earlier this season, Brownell enjoyed a loan spell at non-league Sheffield FC, where he scored three goals in 11 appearances.