From CBS News:

“ Pat Venditte is a pitcher who puts on his pants just like every other minor leaguer. But when it comes to his glove …
It’s a six-fingered glove,” Venditte said. “There’s two thumbs. There’s one pocket here in the middle.”  That’s when you realize he is unlike any pitcher you’ve ever seen, blessed not with one great arm, but two. The reversible glove allows him to switch pitch in a moment’s notice, throwing a 90 mile-an-hour fastball with his right arm, then unleashing a collection of baffling curves with his left. “

So a description is great, but you really have to see this guy in action: