The recovery from myocarditis due to a viral infection is usually rapid and the heart reverts to normal rhythm. Serious myocarditis can lead to heart failure. Pericarditis is inflammation that affects the inner and outer membranes that surround the heart.
When Wilson had his tryout with the Baltimore Black Sox, he earned the nickname Boojum because of the sound his line drives made when they hit the fence during batting practice.
Hitters call this the sweet spot on a bat, or hitting a baseball with that spot is called barreling up the baseball. It's the primary skill in hitting--delivering the part of the bat that can handle impact to the baseball in motion. Here's a decent slo-mo that shows the inherent flaw in using a wooden bat.