articleThe Brief Jen Pawol became the first woman to umpire a regular-season MLB game. Jen Pawol has become the first woman in history to umpire a regular-season Major League Baseball game. Pawol's much-anticipated debut came as the first base umpire for Saturday's first game of a split doubleheader between the Atlanta Braves and Miami Marlins. Dig deeper:As the first base umpire, Pawol's responsibility was to check Waldrep's hands for foreign substances following the inning. RELATED: Jen Pawol will become 1st MLB female umpire this weekendPawol's first real test came in the third inning when she called Braves catcher Sean Murphy safe on a close play.