Seahawks Sign QB Sean Mannion

The Seahawks added veteran quarterback Sean Mannion on Sunday; quarterback Danny Etling was waived to make room on the 90-man roster. John Boyle

The Seahawks added to their depth at quarterback behind starter Russell Wilson, signing former Rams and Vikings backup Sean Mannion on Sunday.

Quarterback Danny Etling was waived to make room on the 90-man roster.

Mannion, 29, was a third-round pick of the