My fictional players keep on losing their ratings for speed, basestealing and baserunning.
I spoke about it in
this thread.
I have tried it since with several players since and it happens some time between the end of the play-offs and the awards announcements.
My latest league, my created (20-year-old) 2B had speed (14), basestealing (15) and baserunning (14) on a 20 scale. When the Gold Gloves were announced it was 1, 1 and 3.