‘A recent survey of NFL physicians showed that nearly 90 percent of NFL athletes who tore the ACL — the primary stabilizing ligament in the knee — were able to return to competition after surgery. That doesn’t mean all were as good as they were before their injury. The Buffalo Bills, the Texans’ opponent today, are counting on the percentages after selecting former Miami running back Willis McGahee late in the first round of this year’s draft despite serious health questions. The All-America running back, projected as a top draft pick, tore the ACL, the medial collateral ligament (MCL) and posterior cruciate ligament (PCL) early in the fourth quarter of the Hurricanes’ 31-24 double-overtime loss to Ohio State in the Fiesta Bowl.’