William Henry Abstein (February 2, 1883 – April 8, 1940[1]), nicknamed "Big Bill", was an American professional baseball and amateur soccer player.

He played all or part of three seasons in Major League Baseball player, from 1906 to 1910, primarily as a first baseman.

He played in 170 games, with 150 hits, one home run, 76 RBI and a batting average of .242.

[1][2] Abstein spent the 1904–05 St. Louis Association Foot Ball League season with Diel F.C.

This biographical article relating to an American baseball first baseman is a stub.