Final answer:
Denny and Matt's seats were in the fourth row from the front and away from the drums at the Mariners game, indicating a close view of the action and a quieter seating area.
Step-by-step explanation:
Based on the provided reference, we can determine exactly where Denny and Matt's seats were at the Mariners game. The tickets, as indicated by the seller, placed them in the fourth row from the front, and specifically away from the drums. This location implies that their seats were close to the action on the field, providing them with a clear and up-close view of the game, while also being far enough from the possibly distracting noise of drums that can be present during sports events.