Tommy Lasorda just turned 91 years young this weekend ... and now he's letting TMZ Sports in on his secret to living to almost a century old!!
We spoke with the Dodgers legend while he was out celebrating the big 9-1 at Rao's in Hollywood on Saturday ... and asked him the key to out-living the average American by 13 years.
FYI -- the U.S. life expectancy is 78. AKA, not great compared to other developed countries.
Lasorda spills the beans on how he beat the odds .