 If you haven't heard by now, SeatGeek is the new official fan-to-fan ticket marketplace of the Seattle Mariners. So whether you're buying or selling tickets to Seattle Mariners games, SeatGeek is the number one destination for all your ticketing needs. But that's not all. If you're looking to score tickets to other events at T-Mobile Park or events across the Pacific Northwest, SeatGeek is the place to do it.