QB Peyton Manning (Broncos): A+
Manning was the biggest and most accomplished free agent in recent memory. He wouldn't have been fourth on the list if not for neck and shoulder surgeries that sidelined him the previous season, making him somewhat of an unknown. Manning not only stayed healthy, he finished runner-up for the NFL MVP and led the Broncos to a 13-3 regular season record. As for the playoffs, that doesn't affect the grade of the signing, it only hurts his legacy. (AP Photo/Patrick Semansky)
The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.