Violet Palmer became the NBA’s first woman referee when she worked Dallas’ opener at Vancouver on Oct. 31, 1997, and Sarah Thomas was the NFL’s first woman on-field official when she served as line judge for Kansas City’s game at Houston on Sept. 13, 2015.

Jen Pawol is set to become the first woman to be an umpire in a regular-season Major League Baseball game this weekend, working for the Atlanta Braves' three-game series at home against the Miami Marlins beginning on Saturday.

Jen Pawol will make history during Saturday's game between the Miami Marlins and Atlanta Braves when she becomes the first female umpire to work a Major League Baseball regular-season game. Pawol will work both ends of the Saturday doubleheader between the Braves and Marlins at Truist Park and then also work the Sunday series finale,