Good morning, I’m Dan Gartland. I was sad to hear that longtime Yankees announcer John Sterling died this morning . Unconventional broadcasters like Sterling are an endangered species.  In today’s SI:AM: 📕 NBA first round in the books 🏇 Unlikely Derby champion 🏎️ Miami Grand Prix If you’re reading this on SI.com, click here to subscribe and receive SI:AM directly in your inbox each morning. Onto the next round It took a little bit longer than expected, but the first round of the NBA playoffs is finally over after a trio of Game 7s this weekend.  The 76ers beat the Celtics in Boston on Saturday behind a spectacular performance from Joel Embiid and will face the Knicks in the conference semifinals.…