If you're looking for Pizza in Athol- go to Tool Town. If you're looking for a pasta dish, then Athol House of Pizza is pretty good. They have a good variety of dishes- the Chicken Fettuccini Alfredo with Broccoli is pretty good, and the portions are large.
They also have a good variety of pizza. It's pretty thin crust, but nothing fantastic in my opinion. There's also an adjacent bakery.
But, if you're looking for GOOD pizza and grinders, go to Tool Town Pizza.