Hunter Greene threw 104.3 mph fastball in Louisville Bats debut
MLB spin rate: Baseball's top pitchers aren't all masters of spin
Fastball - Wikipedia
Collegians are lighting up radar guns, but pitching still required
90-plus: Which Mid-Penn pitchers are lighting up the radar gun with the fastball?
Flamethrowers: Aroldis Chapman headlines the hardest throwing pitchers in baseball – New York Daily News
Hardest throwing pitchers in baseball
Yordano Ventura Is the Hardest-Throwing Starting Pitcher in MLB History
Is Yordano Ventura the hardest-throwing starting pitcher ever? - Beyond the Box Score