Who will be the X factors on wild-card weekend?

After breaking down film and critiquing the teams playing on wild-card weekend, Scouts Inc. tells you who the X factors will be in each game.

Atlanta Falcons at Arizona Cardinals

Falcons CB Chris Houston: He has struggled down the stretch versus good receivers and he can be a little late reacting to the ball, but he will be matched up with Cardinals WR Larry Fitzgerald. The Cardinals will test Houston early, and if he can contain Fitzgerald without help, it will be a lot easier for Atlanta to defend Arizona's multi-receiver sets.

More X Factors

Find out who Gary Horton thinks will be the X-factors in the other three games. InsiderInsider

Cardinals WR Steve Breaston: He is the No. 3 receiver, behind Fitzgerald and Anquan Boldin, but Breaston has 1,006 receiving yards. Because Fitzgerald and Boldin command so much attention, Breaston will be in man coverage versus a No. 3 corner, which is clearly in Arizona's favor. He is also outstanding returning punts and kickoffs.

Gary Horton, a pro scout for Scouts Inc., has been a football talent evaluator for more than 30 years. He spent 10 years in the NFL and 10 years at the college level before launching a private scouting firm, The War Room.