By Dan Gartland The underdogs are thriving. Good morning, I’m Dan Gartland. I hope the rain here in the New York area clears out before Yankees-Guardians Game 5 tonight. In today’s SI:AM: ⚾Gerrit Cole keeps a favorite alive 🎶Rocky Top, you’ll always be … 🏈The Bills’ defense is legit ⚡Zappe hour If you’re reading this on SI.com, you can sign up to get this free newsletter in your inbox each weekday at SI.com/newsletters. The underdogs are thrivingSaturday was one of the most chaotic days of playoff baseball you could imagine. The four games saw the two best teams in the National League eliminat…