Up-tempo offenses, like the one run by Johnny Manziel at Texas A&M, may increase players' injury risk.
Kita K Wright/AP
The people who study this stuff for a living believe Saban and Bielema make a valid point. But before pushing for any changes, they need more data to prove it.
We've Got Apps Too
Get expert analysis, unrivaled access, and the award-winning storytelling only SI can provide — from Peter King, Tom Verducci, Lee Jenkins, Grant Wahl, Andy Staples and more — delivered straight to you, along with up-to-the-minute news and live scores.