Is there a food court at dodger stadium on the top deck that has subway?

No, there isn't. They don't serve Subway at Dodger Stadium. Last year, they were selling sub Sandwiches. They stopped this year. however, they do have a small selection at Canter's. You can find one on the third baseline side, by section 45 on the field. Or you can check an issue of the Dodgers' magazine to see if they have one on the reserve level. If you have a top deck ticket, the lowest level you can go for food is the reserve level.