Blindside block explained: the 15-yard hit on returns, the close-line exception and the 2026 suspension strikes

A blindside block is a hit from a blocker who is moving back toward his own end line, the direction the opponent is least likely to be watching. Since 2019, an NFL player who makes forcible contact that way with his helmet, forearm or shoulder has committed a 15-yard foul. Most of these flags come on punt and kickoff returns, and they often wipe out big gains. In 2026 the blindside block is also one of five fouls that count toward a new three-strike suspension system.

What the rulebook says

Rule 12-2-7 reads: “It is a foul if a player initiates a block when his path is toward or parallel to his own end line and makes forcible contact to his opponent with his helmet, forearm, or shoulder.” The foul has three parts:

• Direction. The blocker’s path is toward his own end line or parallel to it. A blocker running downfield into an opponent is not making a blindside block.
• Force. The contact has to be forcible.
• Body part. The rule names the helmet, forearm and shoulder.

Either team can commit the foul. That includes a punt returner’s teammate peeling back to clear a lane, a receiver blocking for a teammate after a catch, and a defender blocking for a teammate after an interception. The penalty is 15 yards.

The close-line exception

The rule does not apply in close-line play before the ball leaves that area. The close-line play area is the pocket area, between the outside edges of the normal tackle positions, plus three yards on the defensive side of the line of scrimmage. Contact between linemen in the trenches, before the ball leaves that area, is not a blindside block.

The rulebook explains when the ball has not left the area. It stays inside if the player who takes the snap “retreats in the pocket immediately or with slight delay and hands the ball to another player, passes the ball, is tackled, or runs with the ball himself during a designed play.” Once the play moves outside, the exception is over. Even inside it, any forcible contact is “still subject to the restrictions for crackback and peel back blocks.”

Why the NFL changed the rule in 2019

Owners voted on March 26, 2019, to ban the hit at the league meeting in Phoenix. The league said that one-third of all concussions suffered on punts had been caused by blindside blocks. Before then, blindside blocks were fouls only in narrower circumstances. Under the new rule, any forcible contact with the helmet, forearm or shoulder by a blocker moving back toward his own end line was enough. The rule also gives the player who receives an illegal blindside block defenseless-player protection under Rule 12-2-9.

The three-strike system in 2026

This season the league and the players’ union put the blindside block on a short list of five fouls with stricter discipline. The others are the hip-drop tackle, the horse-collar tackle, launching and hits on a defenseless player. A player who commits three offenses in any one of those categories during a season is suspended for one game, and coaches must join players in meetings with the league as they near that line. Every player started 2026 with a clean slate.

The 2026 blindside blocks

Eight have been enforced through Week 6. Seven came on punt or kickoff returns, and the one on a scrimmage play was called on a receiver.

Week	Game	Player	Play
1	BUF at HOU	Sam Franklin Jr., Bills	Punt return, half the distance from the Bills’ 28
4	DAL at HOU	Aiden Fisher, Texans	Kickoff return
4	IND at WAS	Percy Butler, Commanders	Punt return
4	LA at PHI	Puka Nacua, Rams	7-yard run by Kyren Williams wiped out
4	MIA at MIN	Jeshaun Jones, Vikings	Punt fair caught; Vikings backed up 15 yards
5	LV at NE	Namdi Obiazor, Patriots	Punt return
6	CAR at PHI	Feleipe Franks, Panthers	24-yard punt return by Trevor Etienne
6	PIT at TB	Cole Holcomb, Steelers	53-yard kickoff return by Kaden Wetjen

Pittsburgh paid the most. Kaden Wetjen took a kickoff from the 6 to the Tampa Bay 41 in Week 6, but linebacker Cole Holcomb was flagged for a blindside block at the Steelers’ 35. With the 15 yards marked from there, the Steelers started at their own 20, 39 yards behind where Wetjen had been stopped.

The Rams lost a first down to the foul. Down 20-10 late in the third quarter at Philadelphia in Week 4, they had 2nd-and-2 at the Eagles’ 30 when Kyren Williams ran 7 yards to the 23. Nacua was called for a blindside block, and the Rams faced 2nd-and-17 from the 45 instead. They turned the ball over on downs at the 36 three plays later. Los Angeles still came back to win 24-20.

Where the flags come from

The 2025 regular season play-by-play shows 28 illegal blindside block penalties. Nine came on punts or kickoffs and eight on interception returns, when defenders turn into blockers and run back across the field. The other 11 came on other plays. The yearly totals have moved around since the current rule arrived:

Season	Blindside blocks	Games
2017	11	256
2018	7	256
2019	30	256
2020	14	256
2021	11	272
2022	11	271
2023	13	272
2024	12	272
2025	28	272
2026 through Week 6	8	93

Its cousins: the crackback and the peel back

Two older rules deal with blockers who come back toward the ball, and the rulebook lists both as fouls even inside the tight end box.

• Crackback block (12-2-6). It applies within five yards of the line of scrimmage to a player moving toward the spot of the snap who lined up more than two yards outside a tackle, or who started in the backfield and moved out there or was in motion at the snap. Typically that is a wide receiver or tight end crashing inside on a run. He may block, but he may not hit the defender below the waist or with contact that is illegal against a defenseless player. The penalty is 15 yards.
• Peel back block (12-2-2). An offensive player moving toward his own end line cannot start contact on the side of an opponent and below the waist when he approaches from behind or the side, unless his near shoulder completely crosses in front of both of the opponent’s legs. The penalty is 15 yards.

Both have become rare. The play-by-play shows six illegal crackback penalties in 2020, one in 2024 and none in 2025 or so far in 2026, and only four peel back penalties since 2017.

What to watch for

• Watch the return team. When a punt returner breaks to one side, his teammates turn and run back with him. A shoulder into an unsuspecting coverage player is the classic blindside block.
• Watch after interceptions. Defenders who become blockers often run back toward their own goal line and look for someone to hit.
• Check the body part. The rule names the helmet, forearm and shoulder, and the contact must be forcible.
• Expect the return to be cut short. Fouls by the return team are usually marked from the spot of the foul, so a long return can shrink to a drive starting deep in its own territory.
• Count the strikes. In 2026 a third blindside block in one season brings a one-game suspension.

Related WhyNFL reading: Block in the back, clipping and blocks below the waist, Defenseless players and helmet contact, Unnecessary roughness, The chop block and Kickoff blocking rules.