This 'Big Dog' is UPS' safest driver in the world - USA Today United Parcel Service has picked its safest driver in the world, and he's one "Big Dog." Ron "Big Dog" Sowder of Ohio has managed to go 48 years and more than four million miles accident-free. He drives the big tractor trucks and tandem trailers. He's has a new pet peeve, though: drivers who text behind the wheel. From that big-rig cab, there's not a lot that the Dog can't see.