YES, I have seen precisely this effect in my personal life with a friend. A gal I knew left her husband for a doctor at a clinic she worked at, and made the mistake of coming back to the house alone, to get some of her things. He had a toddler rage moment and beat her unconscious with a baseball bat, maybe 50 hits, head injuries, concussion, injuries to wrists, ankles. She was incapacitated for 18 months, so he got custody of their two elementary age kids. She had to learn to walk and talk again. Let's just say that after her eventual recovery, she was a little less... reserved? A little less inhibited than before? (FYI this incident was in Pierce County)
There are plenty of football players who have had personality changes, CTE, become violent, aggressive, after a series of head injuries. So I don't really think it's a stretch to suggest that Adams have have taken one, or one dozen, too many hits to the head, to the extent of affecting his level of social restraint, etc. It also appears ongoing mini-concussions could be affecting his on-field judgment and play, i.e., not able to process the game at the level and speed he could a few big hits to the head ago.
Junior Seau and Dave Duerson come to mind, both NFL all-pros, who committed suicide by shot to the chest, in Duerson's case, leaving a note asking for his brain to be donated for research. In Seau's case, I recall him being a dominant beast on the field every time I ever saw him, twice a year with the old AFC West Seahawks vs Chargers, so I don't think his play fell off much by his retirement. However, football-related head injuries can impact different parts of the brain and have different effects from one player to the next.