Air Force -3 3.3% play

This line opened up at 6 and all the way down to 3 now, and I'm going to fade the steam move here.  There is nothing in one data point to suggest or warrant this type of line move. I was hoping a 2.5 would pop, but I'm not sure it will.  I understand San Jose State hired Ken Niumatalolo and he's familiar with defending the option from his time at Navy, but I feel Niumatalolo has enough to worry about in his first year with a new team and system and I don't think it's enough of an edge to warrant the 3 line move.  San Jose State was picked to finish 10th in the Mountain West, while Air Force was picked 2nd, and Air Force is home here, and only a 3 point favorite?