'49 -- Nice to see someone else old enough to remember when Peden was Ohio Stadium. You younguns can still find that name on the stadium if you look close. Cross Richland Avenue and stand to right of the Ping Tower and look up. You'll see the big stone craved with the words, "Ohio Stadium."
When was the stadium renamed? According to wikipedia the former name was "Ohio University's Athletic Plant". That is a akward name if that truly was what it was called
It was called Ohio Stadium until, I think, about 1955, when it was renamed in honor of Coach Peden. I'm not exactly sure of the date. I do know it was never called "Ohio University Athletic Plant," except in a generic sense. That's why it's called the always semi-accurate Wikipedia.