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.
The pitchers in the 13 and 14 year old age group can be heavily involved in travel baseball, or finishing up their Little League experience. A typical fastball from this age group is anywhere from 55 mph (on the low side) to 75 mph.0 Years Old and Younger. The average fastball velocity for pitchers 10 years old and younger is between 40-50 mph. The average change up speed for this age group is about 10 mph slower, putting the velocity between 30-40 mph. 11 and 12 Year Olds.