There are usually one or two running backs on the field for a given play, depending on the offensive formation.

Note that the difference between halfback and tailback is simply the position of the player in the team's offensive formation.

In 1969, Texas was off and running with its new offensive formation, the Wishbone.

A picture is taken just before the snap, capturing the offensive formation and the defensive alignment.

He will use enough motion and offensive formations to make spectators dizzy.

The I formation is one of the most common offensive formations in American football.

Who will rely on defense and eschew tricky offensive formations?

As with offensive formations, there are many combinations that can be used to set up a defense.

You may see an offensive formation like that below, described as one of three tight ends:

Virtually all modern offensive formations are variations on the T theme.