An interesting article was published just 1 week ago. The study investigated the rate of 2nd ACLs within 2 years of return to play in young athletes involved in pivoting and cutting sports (the mechanism that accounted for both of Easley's NON_CONTACT ACL tears). No previous study has focused on this aspect, an though this study included younger athletes ~17-20 years of age, it probably holds reasonable validity to NFL athletes. In this study, males had a 10.5% chance of suffering a same-side ACL tear within 2 years of their 1st, and a 10.5% chance of suffering an opposite-side ACL tear within 2 years of the 1st.
Especially with this new additional information, I would be guarded re. this 290+ pound (would possibly be asked to gain another 10 pounds when in the NFL) man's future knee status following 2 ACL tears/repairs.