The Club have agreed a deal with Premier League side Brighton & Hove Albion for the sale of Steven Alzate.
Alzate, who signed his first professional deal with the O’s in September 2016, graduated through the Club’s youth system having initially joined at under-13s level.
The creative midfielder made his first team debut on February 28, 2017 as a second half substitute at Stevenage, and marked his first start four days later by scoring in the O’s 4-0 Sky Bet League Two victory at Newport County.
Alzate went on to make a total of 12 appearances last season, scoring one goal and registering several assists.
The Club would like to wish Steven every success for his future career.