"Retired Under Doctor's Advice"
 

Just noticed this in the transaction log. Injury History doesn't show up for retired players, so I'm not sure if this was a concussion or something else. Merging transactions.csv files for this career...

So the csvs don't differentiate like the Transaction Log does, so no idea how frequently this happens. IIRC, Jim's blog post about concussions mentioned this as a possibility.

Seeing this on a few guys each season, but I too haven't yet connected it to concussions or other specific injuries.

Just saw this with David Johnson. He never started all 16 games over the 5 year career (in FOF8 terms) but only missed games in his first two seasons. The last three he played in all 48 games but started 35 of them.

Would be nice to see the injury history.