Fastball

The fastball is the most common type of pitch in baseball. Some "power pitchers," like Nolan Ryan, Roger Clemens, Troy Percival, Bob Feller, Bob Gibson, Sam McDowell, Randy Johnson, Justin Verlander, Joel Zumaya, and J.J. Putz have thrown it 95-100.9 mph (150-160 km/h)(Officially) and up to 107.9 mph (173.64 kph) (Unofficially) and relied on this speed to prevent the ball from being hit. Others throw more slowly but put movement on the ball or throw it on the outside of the plate where the batter cannot easily reach it. The appearance of a faster pitch to the batter can sometimes be achieved by minimizing the batter's vision of the ball before its release. The result is known as an "exploding fastball": a pitch that seems to arrive at the plate quickly despite its low velocity. Fastballs are usually thrown with backspin, so that the Magnus effect creates an upward force on the ball, causing it to fall less rapidly than might be expected. A pitch on which this effect is most marked is often called a "rising fastball", as the ball appears to rise to the batter. Colloquially, use of the fastball is called throwing heat or putting steam on it, among many other variants.

Gripping the ball with the fingers across the wide part of the seam ("four-seam fastball") so that both the index finger and middle finger are touching two seams perpendicularly produces a straight pitch, gripping it across the narrow part ("two-seam fastball") so that both the index finger and middle finger are along a seam produces a sinking fastball, holding a two-seam fastball off-center ("cut fastball") imparts lateral movement to the fastball, and splitting the fingers along the seams ("split-finger fastball") produces a sinking action with a lateral break.