I've posted this elsewhere on the internet but I didn't want to create a thread specifically for it here. Outside of Prime time games, Thursday games, and the International Series most of the games are on FOX. 13 Seahawks games are currently scheduled to be shown on FOX.
FOX tv is free on-line to everyone for 1 hour without signing in. What you see on FOX depends on your IP so if the Sehawks game is only shown in Seattle you will need a Seattle IP address. FOX checks both device id and IP address so after 1 hour you will need either a 2nd IP address or a 2nd device. After 1 hour away from your original id/IP combo you can re-use that combo. Personally I sign out of my paid VPN after 1 hour and use a free VPN for the 2nd hour of games. I switch back for the 3rd hour.
https://www.fox.com/live/channel/WNYW/?id=3e840ae9e119084c2b71acaf68d06049
It's safer than streaming sites, better quality, and it's 'almost live' compared to being up to 90 seconds behind as you are with most streaming sites. Alternatively I can post streaming site info if needed.
If you need a 1st or 2nd VPN service for the US I strongly recommend ProtonVPN which is free. The easiest way to get it is to sign-up for a free ProtonMail email account first. You wouldn't ever need to use their email service and it can be applied for with a 'fake' Yopmail email address from a 'fake' VPN IP address. ProtonVPN have multiple free US locations. Los Angeles is normally free #2 and New York is free #5. There is normally a free # for Seattle but it can be on any of the other free #s, so finding it wouldn't always be instantaneous. It's no-log, secure, and runs on the faster WireGuard protocol.