Michael Lynn Squires (born March 5, 1952) is an American former Major League Baseball player who played for the Chicago White Sox primarily as a first baseman in 1975 and from 1977 to 1985.

Nonetheless, he was a valuable member of the White Sox of the early Tony La Russa era, particularly in their 1983 AL West championship run.

On May 4, 1980, Squires became the first left-handed-throwing catcher in Major League Baseball since Dale Long in 1958 when he was shifted from first base in the ninth inning of an 11–1 loss to the Milwaukee Brewers at Comiskey Park.

[1][2] He would go behind home plate one more time three days later on the same homestand, coming off the bench in the ninth inning of a 12–5 defeat to the Kansas City Royals.

He became the first left-handed-throwing third baseman in at least 50 years on August 23, 1983 when he entered the game for Vance Law in the bottom of the eighth inning in a 10–2 loss to the Royals in Kansas City.