Louis John Klein (July 10, 1916 – October 11, 1979), better known by his ring name Lou Bastien, was an American professional wrestler.

When World War II broke out, in order to support his wife and child, he turned professional in 1942.

After this he and Red went to the Indianapolis region where they became 2-time American Wrestling Alliance Indiana World Tagteam Champions.

Lou also had success in Big-time Wrestling(Detroit) where he was also a 3-time NWA World Tag team champion.

During his later days he helped in training many wrestlers like Art Neilson, Count Drummer, Jim Lancaster, Malcolm Monroe Sr., Rujet Woods, Sandy Parker and Tanya West.