The Iron Bowl is upon us, and No. 1 Alabama will travel to take on No. 4 Auburn this weekend. Tigers quarterback Nick Marshall looks to continue his recent success and lead Auburn in the upset.

College football analyst Michael Felder breaks down what you need to watch for Saturday.

Can Marshall rely on his legs against the Crimson Tide defense? How will his passing ability ultimately dictate the outcome of this game?

Watch the video, where Felder explains why Marshall will be the X-factor in 2013's matchup.

Highlights courtesy of XOS Digital