Why MLB hitters can't hit Jennie Finch and science behind reaction timeAuthor:David EpsteinPublish date:Jul 24, 2013Olympic champion softball pitcher Jennie Finch's fastball takes the same amount of time to reach the plate as a 95-MPH pitch from an MLB mound. But MLB hitters aren't used to the motion and rotation and can't pick it up.Getty Images Pujols stepped out of the batter's box, composed himself and stepped back in. He twisted his feet into the dirt and stared back at Finch. Courtesy of Current A hitter must decide where to swing before the ball has traveled half of its 400-millisecond journey home. Mariano Rivera's cutter is so vexing because it sometimes changes course after that point.McKibillo Courtesy of Current To purchase a copy of The Sports Gene, go here.