Rugby vs. American Football: The Key Differences Explained

Same oval-ish ball, very different games. Here is how rugby compares to the NFL, from forward passes to helmets.

Published Oct 16, 2026 · 2 min read

Vernand Morency (#34) running behind a Daryn Colledge (#73) block. London Fletcher (#59) and Rocky McIntosh (#52) are attempting to tackle hPhoto: joelrivlin, CC BY 2.0 via Wikimedia Commons

American football and rugby are cousins. In the late 1800s, US college teams played rugby style football before rule makers like Walter Camp added the line of scrimmage and downs. Over time the forward pass and protective gear completed the split. Here is how the two games compare today.

1. The Forward Pass

In football, the forward pass is the centerpiece of the offense. In rugby, passing forward is illegal. The ball must go sideways or backward, so teams gain ground by running and kicking.

2. Continuous Play vs. Downs

Football stops after every play and resets at a line of scrimmage. Rugby rarely stops: after a tackle, players compete for the ball in a ruck and play continues immediately. There are no downs and no huddles.

3. Blocking

Football is built on blocking. In rugby, blocking is illegal. You cannot obstruct a defender who is trying to tackle the ball carrier, which makes support running and passing essential.

4. Tackling and Equipment

Football players wear helmets and hard shoulder pads. Rugby players wear no helmets or hard pads, sometimes just a soft scrum cap and a mouthguard. Rugby tackles must be made below the shoulders with the arms wrapping the player, and head contact is penalized heavily.

5. Scoring

Score	Rugby	NFL
Try / touchdown	5	6
Conversion / PAT kick	2	1
Penalty goal / field goal	3	3

In rugby the ball must be grounded in the in-goal area to score a try. Simply crossing the line with the ball is not enough.

6. Team Size

Rugby union has 15 players on the field per team. Football has 11. Rugby players also play both ways, attacking and defending, with no separate offense and defense units.

7. Substitutions

Football allows unlimited substitutions. Rugby allows only a limited number of replacements, so conditioning is critical.

8. Game Length

A rugby union match is 80 minutes with a running clock and few stoppages. An NFL game is 60 minutes of game time but often lasts more than three hours because of stoppages.

9. Kicking

Any rugby player can kick at any time, and kicking for territory is a key tactic. In football, kicking is mostly reserved for specialists on fourth down.

10. Restarts

Rugby uses scrums and lineouts to restart play. Football restarts every down from the line of scrimmage.

Ready to learn the rest? Start with our rugby union rules guide, then check out what the 2031 Rugby World Cup in the USA could mean for American rugby.

Background from Wikipedia

Comparison of American football and rugby union

A comparison of American football and rugby union is possible because of the games' shared origins, despite their dissimilarities.

Text from Wikipedia, CC BY-SA 4.0

Frequently Asked Questions

Is rugby more dangerous than American football?

Both sports carry injury risks. Rugby players do not wear helmets or hard pads, which changes how they tackle, while football players can hit with more force because of their equipment. Both sports have introduced stricter rules to reduce head injuries.

Did American football come from rugby?

Yes. American football grew out of rugby style games played at US colleges in the 1800s. Rule changes, especially the line of scrimmage and the forward pass, turned it into a separate sport.