actor Robert Stack used to race at El Mirage! and at 16-years old he and he his brother won the International Outboard Motor Championships in Italy! (thank you George!)

Here he is pictured at 19-years old in 1938. He is working on his model-a roadster and preparing it for a dry lakes run. Later that day, he set a record at 115 mph.

I'd never heard of him, despite his long list of Hollywood roles on IMDB, but recall the name from the "Unsolved Mysteries" commercials

https://www.jalopyjournal.com/?p=49931

https://www.hollywoodchicago.com/news/37739/film-news-new-doc-unsolved-mysteries-behind-the-legacy-screens-in-chicago-on-oct-4-2023