A question for you LetsRun historians. Has anyone who qualified with a half, but has never run a full, made the Olympic marathon team in the past? Top example this year would be Rupp.
In 1956, Alain Mimoun of France decided to run the Olympic marathon in Melbourne only after his disappointing eleventh place finish at the 10,000 meters. He was not entered in that event until the eleventh hour and he had never competitively run the distance previously. He won it on a scorching hot day, leaving everyone, including his long term opponent Emil Zatopek behind.