Yup, i noticed my ball winning positions getting more yellows in recent seasons too. But with 2 reds in 2 cup matches, conspiracy theories come to mind. Haha cant help it. What Nebu mentioned i have also experienced. In one season, i had a DMC that got 2 reds. But his next season was back to normal, a few yellows but no reds.
I used to have this MC, plays well but was always picking cards, then one day I noticed he has high numbers in aggression - it may have been the highest in the team then.