Hello how may I help you? I'd like some help with a world record please Sure thing I can help with that just give me the details of what you would like to know Who threw the fastest pitch in baseball Aroldis Chapman 105 miles per hour Wow. Was he in the MLB? Yeah he has pitched for the Reds Yankees and cubs Cool. Does he still play now? Yeah he is currently a relief pitcher for the New York Yankees Great! Thanks so much! You are most welcome