Both those times were wind aided yep....don't count!
But.....what Bob Hayes ran on dirt tracks over 50 years ago making his times far superior to what 10,00 guys run today.
That 9.91 was in Tokyo at the Olympics and the first sub10.00 in history.
Googled
The Tyler native not only finished his career as the UTSA's lone four-time All-American, but he also helped lead the Roadrunners to six Southland Conference Championships (four indoor/two outdoor) from 2007-10. Williams claimed nine Southland titles (five indoor/four outdoor), was twice named the league's Indoor Athlete of the Year (2009-10) as well as Outdoor Outstanding Track Performer (2008, '10) and established UTSA records in the 55m (6.23a), 60m (Southland-best 6.59), 100m (9.90w), 200m (20.60w) and 400m relay (39.59).
That..w...means windy. Hayes ran a world record 20,5 on a dirt track.