You can add Rick Pitino to the rapidly expanding Knicks bandwagon. The St. John’s coach sees the possibility of the orange and blue going deep — deeper than the franchise has gone in more than 50 years. Yes, that includes a championship. The Hall of Famer believes this surging group has that kind of potential. Head coach Rick Pitino celebrates after St. John’s second-round win over Kansas in the 2026 NCAA Tournament. Charles Wenzelberg / New York Post “I think they have the best nine or 10 players. They may not have the best three, they have the best nine or 10,” Pitino told The Post. “Their bench is excellent, [coach Mike Brown] uses them great. The improvement offensively and defensively in OG [Anunoby], the improvement in Karl-Anthony Towns away from the basket with his passing, [Jalen] Brunson is the most unique player I’ve ever watched in my lifetime. “I love it. I root for the Knicks like they’re my team.…