http://en.wikipedia.org/wiki/Joel_Zumaya
"The official record according to the Guinness Book of World Records is 100.9 mph by Nolan Ryan in 1974. Ryan's pitch was clocked using coherent infrared radar.
The reliability of radar guns used at MLB games more recently has been questioned. USA Today columnist Mike Lopresti reported that FOX was using radar guns which recorded speeds 3 to 4 miles an hour faster than the readings on the McAfee Coliseum radar guns in Game 1 of the 2006 American League Championship Series."
Those people you listed above Ryan came 21 years or more later when everyone cheated and the radar guns are rigged to be impressive. Guinness doesn't lie.