If the app is meant to defeat counterfeits or reselling the Dodgers won’t be willing to accept printed tickets.

It's not possible to make counterfeits with a modern ticketing system. Each ticket is a unique code, and they are scanned on entry to match with the codes in the system.

As for resale: The attendee name is tied to the ticket in these cases, and ID is checked at the door. I guess an app could be more effective for preventing this than normal digital/paper tickets.