Comment by bufordsharkley

Advance ticketing (at least, based upon my querying online, I was under the belief that Phillies don't have any sort of will-call in effect with the main MLB ticketing, so I took a tablet to be safe--I was visiting from out of town)

Similar to many live music venues: maybe they have a functional will call, but often it's overlooked/nonoperational/etc, so just using the app is the safe call