One hundred mph. Those three digits on a ballpark scoreboard radar gun reading capture what attracts people to sports. Raw power. The human body being pushed to its limits. Even a little danger. “There was a guy I was with in Cleveland named Rudy Seanez,” Indianapolis Indians manager Dean Treanor said. “When I walked up and watched him in the bullpen ... you didn’t feel like you were safe. “There was something different about his fastball.” Gerrit Cole, 22, will give Indianapolis Indians fans that experience every fifth game. He’s one of baseball’s top prospects due, in part, to being able to consistently hit 100 mph with his fastball. That kind of velocity has always excited fans. The debate once focused simply on who threw the hardest. Then radar guns became common in the mid-1990s and the technology has now advanced so that the speed of nearly every professional pitch is posted. Interest has only increased. It’s an example of baseball’s unique mix of numbers and romanticism; the distance from the pitching rubber to home plate has its hardest throwers challenging a nice, round number that anyone can to relate to. It takes .412 seconds for a 100-mph fastball to cross home plate. That’s roughly the same amount of time it takes to blink.