I spent two years of my early career working in New York City as a civil enginner, naturally I am a Yankee fan and naturally Lawrence Peter Berra (Yogi) is one of my Yankee heros. I am not certain, but I think his famous sayings may be more popular than his accomplishments as a Catcher or Manager. I just came across this website which carries a good collection of Yogi's sayings. Here are some of my favorites, some are well-known, some might not, but unmistakably Yogi wisdom:
"I didn't really say everything I said"
"You can observe a lot by watching"
"The future ain't what it used to be"
"If they don't want to come, you can't stop them"
"A nickel ain't worth a dime anymore"
"Why buy good luggage? You only use it when you travel!"
"It gets late early around here..."
"It ain't over 'til it's over"