Air Force vs. San Diego State odds, line, start time: Picks, predictions from expert on 31-22 run

There's Friday night college football in the Mountain West, with Air Force visiting San Diego State at 9 p.m. ET. Rocky Long's bunch comes in off a big victory over Boise State, while Air Force scored a landmark win of its own over Navy last week. The Aztecs are 11.5-point favorites, with the total bet down from 44.5 to 43.5 in the latest San Diego State vs. Air Force odds. Before you make any San Diego State vs. Air Force picks or predictions, you'll want to hear what CBS Sports CFB analyst Tom Fornelli has to say. 

Fornelli has been covering college football for CBS Sports since 2010 and he's a consistent winner when it comes to against-the-spread picks. So far this season, he is 31-22 overall on his college football picks and anybody who has been following along has added a nice chunk of change to their bankroll. 

For Friday, Fornelli has gone over every aspect of Air Force vs. SDSU as he looks to build on his incredible record for the 2018 college football season. 

Fornelli knows the Aztecs are riding a four-game winning streak. In fact, their only loss came on the road against Stanford to open the season. Their resume now includes impressive wins over Arizona State and on the road against Boise State. 

It has been a smothering defense that has helped guide them to that 4-1 record, with the Aztecs giving up just 19.8 points per game. Linebacker Kyahva Tezino has been particularly disruptive, with 4.5 tackles for loss and a trio of sacks.

However, San Diego State's defense will have its work cut out for it preparing for Air Force's option attack on a short week, which means they're no lock to cover. The Falcons average over 255 rushing yards. Versatility is particularly key for the Air Force rushing attack. They have six players on their roster with at least 100 yards rushing this season and nine with at least 80. Eight players have scored.

We can tell you that Fornelli is leaning towards the under. However, he knows a critical x-factor makes one side of the spread a must-back.

Who covers in Air Force vs. SDSU? And which critical x-factor causes one side of the spread to hit hard? Visit SportsLine now to see which side you should jump on Friday, all from a seasoned expert on a 31-22 run, and find out.

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