By William Joyce
The striker moved to St. Mary's in 2012 for a £1.8 million fee and initially impressed with a return of nine goals in 15 games as Southampton clinched promotion to the Premier League.
However, Sharp fell out of favour once the club reached the top flight and has had loan spells at Nottingham Forest, Reading and Doncaster.
The 28-year-old looks set to continue his career in the Championship and will undergo a medical on Wednesday along with Chesterfield centre-back Liam Cooper, who is also set to move to Elland Road.
Sharp is reportedly a target for a number of second-tier sides, but Leeds have stolen a march on other potential suitors as Dave Hockaday looks to further bolster his squad after recruiting, among others, Marco Silvestri, Gaetano Berardi, Zan Benedicic, Tommaso Bianchi and Souleymane Doukara.