Yeah, the Keenan thing had me wondering last year, but look at him this year (back on his early 2017 pace, not keeping up his 2018 second half pace). Sometimes we forget that 16 is a really small sample. So it's easy for splits to look wacky.
That whole article is full of fuzzy math. 1.6 seasons, 3.8 seasons... these things are not taking talent into account. Most players wash out in less than 4 seasons because they are not good enough, not because of health reasons. Devin Smith, Sankey, and Strong will go down as "less than 1.6 seasons played after an ACL tear" statistics here, but realistically, was they coming back anyway? (No)
Frank Gore tore both his ACLs like 15 years ago and is still going strong. But no, I don't have the comprehensive list of ACL tears and recovery time and I don't intend to put in that effort. If you guys want to freak out about ACL tears, please go ahead and start a panic! I'll be buying up Guice shares if you succeed. I'm just trying to tell you, it's been a long time since we've seen a slow recovery from a notable player. Off the top of my head, I'm thinking Deuce and Edge back in the early 2000's.