Reilly signed a one-year deal with Orient on the 31st August 2021.
The 27-year-old midfielder offers a wealth of Football League experience, a majority of which coming in League One and the Championship.
Reilly’s football career started with Birmingham City, and he made first team debut for the Blues as an 18-year-old back in 2012. 66 appearances later, Callum signed for Burton Albion where he registered two promotions, taking the club from League Two to The Championship.
From the 16/17 season, Reilly spent four years in League One with three different clubs: Coventry City, Bury and Gillingham. From the latter, he moved on to AFC Wimbledon for whom he racked up 70 appearances in all competitions, scoring six goals.
The centre-midfielder was the 11th new signing of the 2021 summer transfer window.