I hate to throw ice water on the party, but we have to be realistic.
SMU's next three games (TCU, UCF, Southern Miss) are against three incredibly tough defenses.
-TCU played an atypical game against Baylor. Then they faced Air Force (the Falcons will amass rushing yards on anyone). But they still have a great run defense (#5 last season).
-UCF currently has the #3 total defense in the country, giving up only 86 rushing yards per game. They finished last season as the #8 rushing defense in the country.
-Southern Miss has the #26 rushing defense in the country, giving up just 94 yards per game. And they're ranked 18th in pass defense. Last season, they were the 13th ranked rush defense in the country.
If Zach is able to average 75+ rushing yards over the next three games, it will be nothing short of a miracle. After that, SMU doesn't face any more tough defenses and Zach should return to form.
My personal prediction is for Zach to finish with ~1,100 yards and 24TD.