Quote: rover49 "Can you ever imagine seeing a single athlete competing at 400, 800, 1500 & marathon. '"
David Weir did, and won them all. In terms of able bodied athletics, the 800 and 1500 often get linked together (Seb Coe being an example of the ability to achieve in both), while the marathon can be a natural step from the 10,000. Mo Farah managed a gold in both the 5,000m and 10,000m within the space of a week, so I would imagine it isn't impossible. Has anyone ever tried?