Another member recently posted the same problem that I'm having, but the thread was closed because he never replied.
Alas...I still need an answer.
As he posted:
"I went into the GAME SETUP and OPTIONS section and changed the settings to Recalc Player Ratings Based on Real Stats After Each Year and then set to recalc it every year, to base it on real stats, to base rookie fielding ratings on the Current Season.
After doing that, I noticed that all of my fielding ratings were either TOTALLY GONE (ie, a fielder has ZERO positions rated at), or they were wiped down to like 1 or 2 based on a 1-100 scale.
Freaked me out, so I went back and UNCHECKED the box to recalc the player ratings, but the ratings are gone.
Am I gonna have to go back and manually put them in?"
This happened to me several years into a 2009 league with many moves made, so I don't want to have to start over -- but the issue is (as you would imagine) wreaking havoc with scoring & ERAs.
it's not an issue to fix just my own team -- but every player in the league seems reset and has fielding ratings < 20 (most less than 10).
HELP! (and thanks)