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.
There is no second place. It's off the page, and the maximum number of displayed pitches is 50. Aroldis Chapman has thrown the fastest pitch in baseball this season. He's also thrown the 49 fastest pitches after that. The closer for your favorite team throws hard, certainly. But there is only one Aroldis Chapman, and he's a freak.