Step 1 : Introduction to the question "What is the speed of the fastest baseball pitch ever thrown?"
Aroldis Chapman holds the record for the fastest recorded pitch in the history of Major League Baseball at a speed of 105.1 mph. He has also thrown a pitch that reached 106 mph in a different game, but this speed has been disputed, so the current record sits at 105.1 mph. According to the Guinness World Records, Chapman made the pitch in September 2010 when he was pitching for the Cincinnati Reds in a game against the San Diego Padres. Chapman has been nicknamed the Cuban Flame Thrower and the Cuban Missile. Source: GuinnessWorldRecords