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.
I'm in a serious debate. I say Mickey Mantle was one of the fastest, if not the fastest, ballplayer of all time. Of course, there's dissent and I need facts to prove my case. I read that he was once clocked at 3.1 seconds to first base. That would put him at around 4.1 seconds for 40 yds. That's world class speed, even by today's standards.