Remember that tie at the 1982 Commonwealth Games 200m where it was virtually impossible to separate 1st and 2nd?
In 1990, both Danny Everett and Roberto Hernandez were credited with a time of 31.48 in the rarely contested outdoor 300m. Danny was declared the winner with the new world record breaking the previous mark of 31.70 by fellow American Kirk Baptiste.
Roberto Hernandez of Cuba had a 14 year career with highlights including a fifth place behind Quincy Watts at the 1992 Barcelona Olympics 400 meters, and a fourth place finish at the 1999 World Championships in his final year of Athletics. He also earned a silver medal in the 1992 Barcelona Olympics in the 4x400m relay.
Here is a nice 6 minute clip from YouTube with slow motion replay of the 31.48 300 meters
On March 24, 2000, Michael Johnson set an altitude WR of 30.85A
More recently, LaShawn Merritt ran a 31.31 at the 2006 Road to Eugene ’08 which is the current “sea-level world record”. Jeremy Wariner split 31.58 en route to win the 400 meters World Championships in Osaka.
UPDATE June 12, 2008: Jeremy Wariner runs 31.72 in Ostrava in a special 300 meters.
The All-time men’s best 300 meters can be found here – note how Canada’s Tyler Christopher is ranked 14th all time with some pretty impressive company.