0 out of 11Alex Trautwig/MLB via Getty ImagesTo be a good pitcher, you need more than speed. However, it's still exciting to watch a guy reach 100 mph on the radar gun.After missing the 2019 season due to Tommy John surgery, Hunter Greene, a top Cincinnati Reds prospect, is now healthy and is displaying one of baseball's best fastballs. He also has a Triple-A pitch that clocks in at 104 mph.He is not the only one who smokes.Based on scouting reports and on-field performance, we've identified 10 of the most difficult-throwing prospects in MLB.After receiving extended looks in major leagues last year, the goal of this event was to highlight pitchers that most MLB fans have never had the chance to see in action. Sixto Sanchez and Nate Pearson from Toronto were both excluded.Let's begin with honorable mentions that are worth your attention.You can find it here: "Spencer Torkelson & MLB's 10 Best Prospects for Power-Hitting in 2021" from just two weeks ago.
