"Ownage" -- referring to the command a pitcher or hitter has over his opponent--i.e., he "owns" the other player: He can get the other out reliably, or he can hit safely against him.
Going "yard" --which means hitting a home run, hitting the ball out of the field of play (the "yard").
These are entertaining and accurate coinages, not the result of stupidity or laziness.
Mispronunciation: "Breakfuss." Also "breakfusses."
On the radio: "If he would of done that, he'd of had it how it could have been."