Did the seahawks have a minus yardage game?

Answer 1

Yes.

The Seahawks were credited with -7 total yards in the game against the Los Angeles Rams on November 4, 1979. They gained 23 yards rushing and -30 yards passing. They actually gained 25 yards passing but because NFL stats subtract yards lost on sacks from a team's total passing yards (and the Seahawks QB, Jim Zorn, was sacked 6 times for 55 yards lost) they were credited with a -30 in total passing yards.

The -7 total yards is the NFL record for fewest in a game.

The Seahawks lost the game, 24-0.