Washington Quarterbacks with a winning record in the Playoffs since 1970

Quarterback W-L-T Record as QB of Washington Team
Joe Theismann 6-2-0
Jay Schroeder 2-1-0
Doug Williams 3-0-0
Mark Rypien 5-2-0
Jayden Daniels 2-1-0

There wasn't any actual record like this for Sammy Baugh. He was 2-4 in NFL Championships though.

Sonny Jurgensen only played in one Playoff game, a 19-10 loss in 1974 to the LA Rams where he didn't start. That was the last game he ever played.

Billy Kilmer had a 2-5-0 record in the Postseason. Both Mark Brunell and Brad Johnson were 1-1-0.

No one else ever got close.

Funny enough, all five of those guys lead Washington to at least one NFC Championship appearance.