I've been to PizzaPapolis once, and it seemed pretty good. The building is right off of the LF foul pole, so walking distance is minimal. Spaghetti Warehouse is an area favorite (not so much for me) and an easy walk. There is a satelite Tony Packo's right off of the RF entrance as well.
I like The Blarney, which is across the street from PizzaPapolis. Have not been there in a few years, but I liked their Reuben. And they have beer.
Ye Olde Durty Bird is on the opposite corner of the yard. Decent patio area, good food.
Maumee Bay Brewing is a little bit off of the block from the stadium, but only a few minutes away. If you are familiar with the High Level Bridge, it basically sits at the foot of that. Good beers brewed on the grounds there. I wouldn't walk it, so this may not be a good option for you.
There are other restaurants in the "Hensville" area, but I cannot speak to them. We just don't head down around there for eats very often.