3:20 | NFL
SI Now: Marino: Why Peyton is losing sleep over Seattle's defense
On Wednesday's SI Now, Hall of Famer Dan Marino and NFL senior writer Don Banks discuss the biggest challenges Peyton Manning and Russell Wilson face preparing for their Super Bowl showdown.
SI Apps
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide - from Peter King, Tom Verducci, Lee Jenkins, Seth Davis, and more - delivered straight to you, along with up-to-the-minute news and live scores.