Toyosi Olusanya has made a permanent transfer to Scottish side St Mirren.
The attacking player began his professional career with AFC Wimbledon, but was plucked from non-league Billericay Town to join Boro under former boss Neil Warnock last summer.
Olusanya, 24, went on to make three substitute appearances for Boro’s senior side last season, as well as several more for our Under-23s.
Toyosi departs with the best wishes of all at MFC.