If you’re interested in taking a bus or a train to the playoff game, Seattle Transit Blog has the pertinent details.
Metro will once again be providing $4 (each way) cash-only shuttles from Northgate Transit Center, Eastgate Park&Ride, and South Kirkland Park & Ride, leaving each lot from 11:25 a.m. to 1:00 p.m., and then picking up at 5th Ave S & S Weller St (on the east side of International District / Chinatown Station) after the game.
Sounder will once again be running pre-game trips to Century Link Field and post-game trips back to all Sounder stations. The schedule may look familiar because it is identical to the regular season game-day schedule. The only difference is this game is on a Saturday.
For those flying in from out of town, Link Light Rail gets you from the airport to Century Link Field. You can get an all-day ticket on Link at any ORCA vending machine, including the ones at Seatac/Airport Station, for $5.50. Set Seatac/Airport Station and Westlake Station as the termini of your trips so that you can travel anywhere Link goes all day. The best station for getting to the stadium is International District / Chinatown Station. Stadium Station is designed for the best connection to Safeco Field (where the Mariners play), but is also a decent option if you will be in the south end zone.
Obviously, good info if you need it. But it also makes me think of public transit’s ability to scale up. While there is more need for car infrastructure in SoDo, it’s not something you can just build more for the game. On the other hand, you can add more buses and trains for a peak time.