Blazing Fastball
Measured honestly across baseball history
A velocity hall built on one rule: compare like with like. Modern release-point tracking gets a true leaderboard; older readings keep their original method and every necessary asterisk.
Originally reported at 105.1 mph. MLB later recalibrated early PITCHf/x readings to release-point equivalents, adding 0.7 mph to this pitch. Source 1
Each pitcher appears once, ranked by his fastest documented pitch in the release-point tracking database. Ties share the same rank.
Peak speed is one pitch. This board rewards the harder feat: living there for a season. Starters and relievers stay separate because their workloads do not compare cleanly.
Original reading first, then the measurement point and any defensible release-point estimate. Adjusted figures are arguments—not records.
Rockwell International technicians measured Ryan in the ninth inning. Guinness recognized the reading as a world record. The modern release estimate comes from physicist Alan Nathan’s drag adjustment. Source 8
A 30-pitch pregame promotion measured by an artillery chronograph. The wide estimate depends on the drag model; the separate 107.9 mph Griffith Stadium claim is considered apocryphal. Source 9
An extraordinary documented stadium-gun reading, but not part of the recalibrated release-point database and therefore excluded from the official 105 Club. Source 1
A single test pitch after nearly the full flight. One retelling gives the raw number as 86.6 mph, so even the original figure is disputed. Source 10
Converted from 134, 127 and 124 feet per second. These are documented period measurements, not release-point readings. Source 11
These names belong in the story, not in a numerical ranking. Reputation, film and promotional stunts cannot be made equivalent to release-point tracking.
A minor-league phenomenon from 1957–1966, commonly estimated at 105–110 mph. Ted Williams called him the fastest ever; he inspired Nuke LaLoosh in Bull Durham.
Anecdotal · not ranked Source 12His reputation is secure, but this research found no verified velocity measurement that can be placed beside modern release-point data.
Open question · not rankedFrequently remembered among the game’s most overpowering arms. No verified comparable velocity reading was found in the reviewed sources.
Open question · not rankedA fearsome fastball reputation without a verified, comparable number in the reviewed evidence.
Open question · not rankedCredited at about 104 mph in 1940 after accounting for a motorcycle’s head start. Ingenious showmanship, but an estimate built on an estimate.
Estimated · not ranked Source 9Credited at about 97 mph in 1914 in a race against a motorcycle. It remains part of the lore, not the measured leaderboard.
Estimated · not ranked Source 9Both comparisons come from the same 2026 Associated Press report. Source 7
Every pitch from 2008 onward is expressed at release point after MLB’s recalibration.
Keep the raw reading, name where it was taken, and show any drag adjustment separately.
Historical readings measured near the plate are ranges after adjustment, never exact equivalents.
Film estimates, motorcycle races and testimony remain stories—not sortable measurements.
The record is a moving target. This is a researched snapshot through October 2026, not a live feed. Season averages reflect the values and qualifier descriptions available in the cited research; minimum-innings rules vary by source.