Swimming Olympic Games 1968 at Mexico City (mex) Men: 400 m Freestyle October 23: Final: 1. Mike Burton (usa) 4:09.0 2. Ralph Hutton (can) 4:11.7 3. Alain Mosconi (fra) 4:13.3 4. Greg Brough (aus) 4:15.9 5. Graham White (aus) 4:16.7 6. John Nelson (usa) 4:17.2 7. Hans-Joachim Fassnacht (wge) 4:18.1 8. Brent Berk (usa) 4:26.0