In Favre's case I remember during McCarthy's first year as coach he got after Clifton and Colledge a couple of times. Favre was pressing late in his career to win and it sometimes brought out the worst of his character. You don't lead the NFL in all time interceptions thrown and then bitch at teammates on the field. Favre understood mistakes better than anyone, whether it was throwning INTs or getting a receiver decked by throwing high over the middle.