Auburn will try to run down No. 3 Alabama

With quarterback Bo Nix out for the year with a broken ankle, Auburn’s best offensive weapon is tailback Tank Bigsby.Alabama’s defense is, as usual, strong against the run — ranked fifth in FBS at 85.9 yards per game, although Florida showed earlier in the year that it’s possible to gash that defense with a ground attack.Something will have to give Saturday in the Iron Bowl at Auburn, where the third-ranked Crimson Tide (10-1, 6-1 SEC) will try to hold on to their spot in the College Football Playoff’s top four against a bitter rival that would love nothing more than to ruin their season.Bigsby appears to be the Tigers’ best chance. Coming off a 164-yard game last week in a 21-17 loss at South Carolina, Bigsby is 60 yards away from 1,000. As Alabama coach Nick Saban noted earlier this week, Bigsby runs behind his pads and can make defenders miss.”He has a big, strong lower body,” Tide linebacker Will Anderson said. “He’s able to extend plays to his legs, run through defenders and stuff like that, and be able to get more yards on his tackles and stuff like that. So I think that’s a big part of his game.”As good as Bigsby has been at times this year — he has five 100-yard games — he’s still going to need a little help from quarterback TJ Finley. The LSU transfer led two touchdown drives in the first quarter at South Carolina but couldn’t get much done after that.Finley was 17 of 32 for 188 yards and a touchdown.”He did some good things,” Auburn coach Bryan Harsin said. “I thought he led on the sideline. I knew he worked hard leading into it, and we didn’t get the result we wanted.”