Did Cooper Kupp have a first down? Why Seahawks WR was ruled short in game-ending decision

Key points

• Officials ruled Seattle receiver Cooper Kupp short of the first-down marker on a fourth-and-10 in the final minute of the fourth quarter. Kupp appeared to get the ball past the line, but the ruling was that the ball was over the out-of-bounds line before it reached the marker.
• Replay did not provide convincing evidence to overturn the call on the field, so it stood.
• The Seahawks turned the ball over on downs and lost 32-29 at home to the San Francisco 49ers, a result that could hurt their NFC West chances.