When I played FB way back when we had an 8 yr run deep into playoffs at our school. State finals runner up and one state championship. What I experienced was coaches putting best team out there, subbed when they could and all things equal seniors got preferance. I played fresh yr than back up OLINE until senior graduated. I harbored no ill will as he was better than i. Coaching was excellent, hardnosed, demanding etc. Coaches also worked hard, made the game fun and by working non starters in when they could they fielded rosters numbering 85-100 players. There were some players who saw very very very limited play but showed up and stuck it out just to be part of something big. I credit coaching for that.