Baseball umpire Jen Pawol will make history this week as the first woman to work as an umpire in a Major League Baseball regular season game, crossing a historic gender barrier.

Between replay review, automated balls and strikes and viral lowlights on social media, the work of baseball umpires has been transformed by technology. But none of that has deterred aspiring umpires.

Baseball umpire Jen Pawol will make history this week as the first woman to work as an umpire in a Major League Baseball regular season game, crossing a historic gender barrier.