Playbooks

HB Lead is a downhill Iso run out of the I Form Tight set with 22 personnel, putting a true fullback in front of the HB to lead through the hole. The diagram shows the FB attacking the point of attack behind the offensive line while the HB follows his path, with the line executing a power/Iso blocking scheme to seal interior gaps. This is a run play, not a man or zone beater, and the primary read is the FB kickout or lead block, meaning the HB should key the fullback's block and press the hole before bouncing outside if the alley is clogged.
Pre-snap, count the box defenders, if there are seven or more in the box with both safeties creeping down, this run play is likely to get stuffed at the line. Watch the Mike linebacker's depth and shade, if he flows fast downhill toward the FB's lead block path he will win the leverage battle and blow up the play in the backfield. Post-snap, key any user-controlled defender spying the A or B gap since a manual blitzer can beat the FB's block before the lead is established. Nano blitzes and A gap overload fronts are the biggest threat to this concept because they occupy the FB's block before the hole develops, forcing the HB to bounce prematurely. Against base 4-3 or 3-4 fronts with normal linebacker depth and no extra run support from the safety, this play should consistently pick up positive yardage on the interior.
Run HB Lead against light boxes with six or fewer defenders in the box to let your FB and O-line win the numbers game up front.
Check the pre-snap alignment of the Mike linebacker, if he is stacked directly over the A gap consider audibling to HB Off Tackle or HB Power O to bounce the point of attack.
Use manual control on your fullback right at the snap to help him identify the correct linebacker to seal, especially against 4-3 Under fronts that stack extra bodies inside.
Pair this play with HB Toss and HB Stretch earlier in a drive so defenders start flowing hard outside, then hit them with HB Lead to gash the suddenly light interior.
This play shines on early downs (1st and 10 or 2nd and short) when you want to stay on schedule and set up play action shots like PA Ctr Shot or PA Power O off the same look.