Michael Oher knew the Tuohy family were his "legal conservators" in 2011, despite claiming in legal docs that he just became aware this February ... and the proof is in the former NFL star's own book.
Oher wrote "I Beat The Odds: From Homelessness, to The Blind Side, and Beyond" -- a memoir that was released in 2011 -- and specifically talked about the legal relationship he had with the family.
"It kind of felt like a formality, as I'd been a part of the family for more than a year at that point.