DXM is also used recreationally. When exceeding label-specified maximum dosages, dextromethorphan acts as a dissociative anesthetic. Its mechanism of action is via multiple effects, including actions as a nonselective serotonin reuptake inhibitor and a sigma-1 receptor agonist.
Aroldis Chapman has thrown the fastest pitch ever recorded, but he has challengers for baseball's hottest heater in 2017. Ever since Aroldis Chapman delivered a 105 mph fastball to Tony Gwynn Jr., Chapman's name has been synonymous with velocity.
Major League Scouts consider 90 mph an average major league fast ball. 95 mph is considered a plus fastball velocity, and +97-98 mph a plus, plus velocity. the 90 range is a good speed for an mlb pitcher. some pitchers do pitch in the high 80s though.real good pitchers pitch 100mph too. Randy Johnson threw a 103 mph fastball.5 mph is considered a plus fastball velocity, and +97-98 mph a plus, plus velocity. the 90 range is a good speed for an mlb pitcher. some pitchers do pitch in the high 80s though.