Assertion: fastball's speed | /r/CapableOf | prevent the ball
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Source sentences:
text: Power pitchers," such as former American major leaguers Nolan Ryan and Roger Clemens, rely on speed to prevent the ball from being hit, and have thrown fastballs at speeds of 95–105 miles per hour (153–169 km/h) (officially) and up to 108.1 miles per hour (174.0 km/h) (unofficially).
text: Some "power pitchers," such as Nolan Ryan and Roger Clemens have thrown it at speeds of 95–106 mph and up to 108.1 mph, relying purely on speed to prevent the ball from being hit.