The Pulse Newsletter 📣 | This is The Athletic’s daily sports newsletter. Sign up here to receive The Pulse directly in your inbox. Good morning! Dunk for Russ today. Coming up:  🫠 Buster Posey’s future 😳 What’s going on in L.A.? 👋 Bye, Russ There is no one in baseball, or maybe even sports in general, that fascinates me more right now than Buster Posey. Just consider:  Posey is, unassailably, a Giants legend. A homegrown star player who won three World Series for the franchise. A fan favorite, a leader and golden boy, wrapped into one person. A prototypical...