Two-time gold medal winner Maurice Greene says drug testing past samples could RUIN Track & Field ... 'cause the sport can't handle a constant barrage of doping scandals.
Usain Bolt was stripped of a gold medal this week when it was revealed a teammate tested positive for a banned substance ... from a sample that was taken in 2008 and recently retested.
We talked with Green -- one of the premiere sprinters in U.S. history -- who said it's dangerous to go poking around in the past looking for mistakes.