About 10 minutes before my flight to Philly was to board, I received an email from my 9am appointment. I had sent them a message about being 3 hours late. They could not accommodate the later meeting time, so I no longer needed to go to Philly. I saw myself taking a flight to Philly just to get on a train back to New York.
The United Gate agent was able to pull my bag from the plane and ensured (hopefully) that the rest of legs would not be cancelled.
Now I have the day in New York… And thanks to my lovely wife, tickets to see game 5 in Yankee stadium.