Marcus Pettersson Observes Mike Sullivan's Philosophy Taking Hold with Rangers

• Marcus Pettersson spent parts of seven seasons with the Penguins under Mike Sullivan.
• Pettersson believes Sullivan's coaching philosophy is now impacting the Rangers.
• Sullivan is currently the head coach of the New York Rangers.
• Pettersson's experience with Sullivan's methods provides unique insight into the Rangers' current identity.
• Sullivan's coaching approach was observed during a Rangers game against the Islanders on September 25, 2026.