The first guy was Albert von Killiker, who first observed "granules" in muscles that would be later be confirmed as cell organelles by Richard Altmann (couldn't find a picture) and dubbed as "bioblasts". Carl Benda (no picture) coined the name that makes this weeks theme - mitochondria.
the second picture is Peter Mitchell who came up with the chemiosmotic theory for how mitochondria synthesis ATP. the final picture is of Paul D Boyer who conducted most of the research on how ATP is synthesised.
The olympic link was energy as I'm sure the athlete's mitochondria were working overtime!