who has the fastest fastball in the mlb
Aroldis Chapman On July 11, 2014, Chapman broke the record, previously held by Bruce Sutter, for the most consecutive relief appearances with a strikeout, having struck out at least one batter in 40 consecutive appearances. Chapman's streak began on August 21, 2013,[2] and lasted 49 consecutive games over two seasons, with the 49th and final game being on August 13, 2014. He shares the record for the fastest recorded pitch speed in MLB history, at 105.1 miles per hour (169.1Â km/h),[3] as well as the Guinness World Record for fastest baseball pitch.[4]
Fastest recorded tennis serves Although the Association of Tennis Professionals does not formally recognize service speed records made in Challenger events due to the variance in radar guns, the serve of 263.4 km/h (163.7 mph) recorded by Australian Sam Groth at an ATP Challenger event in Busan, South Korea in May 2012 was measured using approved equipment according to ATP, and other data gathered appeared within a normal range. However, John Isner holds the official record for the fastest serve at 253 km/h (157.2 mph).[2]