T-Mobile Park Entry Rules: Bags, Water, Food and Cameras

Sealed clear plastic water bottles up to 32 ounces, one empty reusable plastic bottle of 32 ounces or smaller, baby bottles, medical beverages and unopened soft-sided juice containers are permitted. Soda, coffee and other drinks are not, and neither are metal containers and thermoses. Outside food is permitted in single-serving sizes. Hard-sided and Styrofoam coolers, hard plastic inserts for soft coolers and backpack coolers are prohibited. The page does not name other soft-sided coolers, which would have to fit the clear bag rule.

Personal photography and video are allowed for personal use only, and videotaping game action is prohibited. Cameras with a lens 6 inches or longer when fully extended, video cameras, tripods, monopods and selfie sticks are not allowed. Cameras with lenses 6 inches or larger when fully extended, and detachable telephoto lenses, are not permitted. Tripods, monopods, extendable gimbals and selfie sticks are prohibited. Drones are on the prohibited items list. Laptops and tablets are permitted as long as they do not interfere with other guests' enjoyment of the event. They still have to fit an approved bag. Laptops and tablets are permitted as long as they do not interfere with other guests' enjoyment of the event. The page does not mention power banks.

Fold-up strollers should be checked at a Guest Service Center at Section 128 or 329. Strollers and other mobility products should not be left unattended, and a claim-check ticket is given. Exceptions are made for medically necessary items and for single-compartment diaper bags up to 16 x 16 x 8 inches when the child is present.

Umbrellas are permitted for Mariners games, but they cannot be open in the seating areas or block other guests' views. Chairs, stools and bleacher seat backs that contain metal are prohibited. The page does not mention soft cushions. The pages do not mention blankets.

Banners and signs are permitted if they do not obstruct other guests' views or ballpark signage. Signs or banners with non-sporting messages are prohibited, and flag poles or sticks of any material are too. Flag poles or sticks of PVC, wood or any other material are prohibited. The page does not say flags themselves are banned. The pages do not mention binoculars.

Exceptions are made for medically necessary items and for single-compartment diaper bags up to 16 x 16 x 8 inches when the child is present. The page describes no separate medical bag process.

Everyone is screened for prohibited items with a walk-through or hand-held metal detector. Guests are not permitted to re-enter the ballpark once they leave, and in an emergency only a Shift Captain or Zone Supervisor can grant re-entry. Guests with questions can call the ballpark before arriving.

The Mariners offer no storage and do not check coats or personal items such as backpacks or purses, and they have no liability for lost or stolen items. Strollers, wheelchairs and other mobility products can be stored at the Guest Service Centers at Section 128 or 329.

The prohibited list is for Mariners home games. The page says it can change without notice for non-Mariners home games, concerts and other special events, so check the event page.