Is 120 miles per hour as fast as a Knuckleball (baseball)?
It's about one-and-four-fifths times as fast as a Knuckleball (baseball)
The speed of a Knuckleball (baseball) is about 67 miles per hour.
(a.k.a. knuckler, a.k.a. floater, a.k.a. dancer, a.k.a. butterfly ball) (major league average)
The average speed of major league knuckleball pitch is 68 miles per hour. Eddie Cicotte, who was later implicated in the 1919 Black Sox scandal, is credited with developing the pitch ca. 1906.
There's more! See other comparisons to 120 miles per hour...