A striker that signed a one-year deal, with the option of a further 12 months, at the end of the summer transfer window.
Leon has plenty of Championship experience with spell at Derby, Blackburn, Brighton and most recently, Rotherham.
He impressed whilst on trial at Town which led to the forward being offered a deal, as he scored in an U23 game against Birmingham.
Best has also had international experience with the Republic of Ireland and has earned seven caps in his career.
He has been given the number 9 shirt.