What is the velocity profile of a pitched baseball?

Answer 1

Most non-gimmick major league pitchers have a fastball that can hit at least 88-90 MPH. An average fastball is probably around 92-93 mph, an good power pitcher can throw in the high 90s, and an elite few can break 100 mph, such as Bobby Jenks, Bartolo Colon and Joel Zumaya.

A good changeup is between 10-15 MPH slower than your fastball; while knuckleballers such as Tim Wakefield tend to throw in the 55-65 range.