Which drills shouldn't we run?

USA Football recommends leagues prohibit these player-to-player contact drills:

• Board drill / OL vs. DL in-line run blocking with no run/pass or left/right option
• Bull in the Ring / King of the Circle
• Oklahoma drill
• Pods / 3-spot without a run/pass read

Also avoid any drill that:

• only teaches contact "down the middle" of an opponent, with no intent to offset the contact point;
• lets players win only through collision, not with speed or angles;
• is game- or pod-based with no game-specific reaction (a set ball insertion point, no run/pass option, no assigned gap);
• is full contact with more than a 2-to-1 player ratio.

These drills have high head-impact exposure and little carryover to real game skills.