Lester Wayne (Les) Lancaster (born April 21, 1962) is a former professional baseball player.

Along with fellow reliever Mitch Williams, Lancaster helped lead the Chicago Cubs to a 1989 National League East division title.

Lancaster played college baseball for the Arkansas Razorbacks and Dallas Baptist University.

In 703.2 innings of work, Lancaster was 41–28, a winning percentage of .594 with an ERA of 4.05.

This biographical article relating to an American baseball pitcher born in the 1960s is a stub.