Jahangir Khan

Jahangir Khan's 555 consecutive squash victories from 1981 to 1986 stand as the longest winning streak in any professional sport, yet his dominance remains obscure. He won six World Open titles and ended his career with a 99.9% win rate across 1,500 matches. This streak is 75% longer than the runner-up in squash and outlasts even Steve Nash's 226-game NBA playoff streak for consistency. Khan's 1983 season saw him lose just 3 games total, a feat 90% more efficient than the average top-10 player. His unmatched endurance and 12-minute average match duration beat the typical rival's 18-minute pace. Despite this, Khan's legacy is confined to squash, making him the most underrated athlete on this list by any quantified metric of sustained excellence.