We don't know anything. They were taking his pulse, and I assume they had better gear for the medical team than just a blood pressure cuff.
Someone decided he needed an ambulance, and I am glad he's okay.
If you have ever thought you were having a heart attack or experienced severe dizziness (possibly a sign of stroke), you're an idiot if you try to drive yourself to the hospital.
Is an ambulance crew on hand at the stadium anyway, during games? If so, making use of it was the absolute correct call.