Lot of factors may affect percentage of FG. Random factor is probably the strongest one, but type of shots also may be important. IS 15 isn't likely to be considered when your player scores from 3FG/midrange, from example. Maybe your player had a low JS and lot of such shots?
Also, team defences may change the chances of making a shot, as they're taken into consideration when the shot is open.
In some cases, it may make the open shot harder to guard than the guarded one!
Leniwy, stary, wyliniały kocur. Czasem jeszcze zerknie na polskie tłumaczenia.