Youth team product Josh Koroma signed his first professional contract with the Club in September 2016.
The skilful forward was handed his Orient debut at Barnet on April 9, 2016, when he came on in place of player-manager at the time Kevin Nolan.
Koroma became the youngest O’s player to score a hat-trick for the Club on March 4, 2017, when the O’s claimed an emphatic 4-0 victory at Newport County.
The forward made a total of 25 appearances for O’s first team during the 2016-17 season, scoring three goals.
An England C call up was the reward for an impressive second-half of the season for Koroma who made his international debut against the FA of Ireland Amateur international on May 27, in Dublin.