 During his time at Lancashire, Mendis frequently practised in the nets with Wasim Akram.In 1988, Mendis carried the bat in a match against Glamorgan at St Helen's, Swansea; Mendis scored 65* in Lancashire's second innings total of 163.In 1990, Mendis was part of the Lancashire team that won both the Benson & Hedges Cup and the NatWest Trophy.