Margaret Callaghan Maxwell (born December 23, 1921) was an infielder who played from 1944-1951 in the All-American Girls Professional Baseball League. Listed at 5' 3", 112 lb., she batted and threw right-handed.

A native of Vancouver, Callaghan was one of the fifty seven girls from Canada who played in the AAGPBL during its 12-year history. A light hitter, she only topped the .200 mark in batting average twice her entire career, hitting .196 in eight AAGPBL seasons with four different teams. But Callaghan had an uncanny ability to get on base, by any means, way above than the pure ability to get the hit, reaching first base by walks, by a bunt single or being hit by the pitcher. Incidentally, the relatively low batting averages from the 1943 season through 1947, before a smaller ball was introduced in 1948, reflect mainly the high quality of the AAGPBL pitchers, rather than a lack of skills by the hitters. In addition, Callaghan stole 283 bases and posted a solid .319 on-base percentage. On the field, she divided her time between playing second base and third for a collective .921 fielding percentage.

Callaghan is one of five children (three sisters and two brothers) into the family of Albert and Hazel (née Terryberry) Callaghan, of Irish ancestry. She grew up in a home where baseball was considered of vital importance, as her younger sister Helen teamed up with her in the AAGPBL and her nephew Casey Candaele played in Major League Baseball. Athletically inclined, Marge and Helen filled their student days at King Edward High School participating in almost every sport the school had to offer, competing in track and field, basketball, lacrosse, volleyball, soccer and field hockey. The sisters also played softball for the Vancouver Western Mutual team and performed at the 1943 World Series Softball tournament held at Detroit, Michigan, where they were recruited by a AAGPBL scout.

...
Wikipedia