If there's one thing that has changed about pitching deliveries over time, it's that they are a lot more streamlined. You don't see a lot of pitchers throw a ball like Luis Tiant or Juan Marichal did back in the day, as those deliveries are usually stopped in the minors.
There are some pitchers, however, that do their own thing when it comes to deliveries. Ryan Dempster wiggles around his glove right before he pitches, for example. Other pitchers, however, throw all their weight into their deliveries, and it shows.
The following are 10 of the most violent deliveries in MLB today, whether it's due to how they move their arm, how fast they're throwing or how likely it looks that they could fall off the mound each time they pitch.
It's likely that I've missed a few players that do have violent deliveries—I can't say I've seen every player pitch.