Morton left-back Mark Russell has signed a new contract that will keep him at the Greenock club until the summer of 2017.
The 19-year-old, who can also play in midfield, has made 50 league appearances for Jim Duffy's side since making his debut in November 2013.
Morton have also tied up Jai Quitongo until the end of next season following some impressive performances for their table-topping Development League West side.
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