Eury Perez of the Miami Marlins came to the Majors with a 97 MPH four-seam fastball and a reputation as a fireballer. He didn’t disappoint across his Minor League career, registering a WHIP below 1.00 and averaging 12.6 strikeouts per nine innings pitched. A funny thing happened on the way to becoming the next great strikeout pitcher. It turns out Major League batters can hit 97 MPH if it’s relatively straight. Despite the four-seamer with a velocity in the 98th percentile and spin in the 99th percentile averaging 97.3 MPH, Eury Perez’s fastball has been hit for a slash line…