Results of the paired-samples t-tests showed that the concussion retirement number and adjusted concussion retirement number were significantly higher than the ACL retirement number and adjusted ACL retirement number, t(293) = 18.12, p < 0.001, d = 0.88, and t(293) = 12.76, p < 0.001, d = 0.63, respectively. This evidence concerns the gene ACLY and concussion.