Well done, JumboElliott.
Paavo Yrjölä had to do the hurdles twice en route to winning Olympic decathlon gold in 1928, one of the hurdles having been misplaced the first time around. (That the hurdles weren't one of his best events in the first place didn't help.) Matti Yrjölä, his son, broke the Finnish shot put record some fifteen times. (In addition, Iivari Yrjölä, Paavo's brother, was also an Olympic decathlete.)
Glenn Morris, the 1936 champion, appeared as Tarzan in Tarzan's Revenge in 1938, besides a couple more minor acting roles.