There are 11 total players included in each team set, and 5 different player poses in each set.
First is the LINEMAN figure. You get 3 LINEMAN figures per team. Notice that he is bent over, with his elbows out so he can make contact with players beside him. Because his body position is lower than the more upright figures, he has a low center of gravity. This makes him less likely to get knocked over. Because his mass is spread out equally, it makes him harder to push. Linemen are best on the offensive and defensive lines, where you want strength and the ability to push players around.
Next is the ALL PURPOSE figure. You get 2 ALL PURPOSE figures per team. This player is squatting, with his arms hanging to his sides. ALL PURPOSE is very well balanced. He is a versatile figure capable of playing many positions. Use one at quarterback and the other at running back or tight end. On defense, use them as cornerbacks or defensive tackles.
The BACKER figure is the tall player standing with his hands out to his sides. You get 2 BACKER figures per team. He is often used at the offensive tackle and tight end positions on offense, and can be used at the linebacker, defensive end, and safety positions on defense. His height makes it more difficult for the TTQB to throw over him. His wide stance offers a greater chance of an errant pass hitting him, increasing the odds of an interception.
The RUNNER figure, while intended to be a stiff-arming running back, can also be used as a slot receiver on offense. You get 2 RUNNER figures per team. On defense, they make great pass rushers at the defensive end position. They also make good cornerbacks because they can grab opposing receivers, preventing them from getting open.
The SPRINTER figure makes a good wide receiver, and they work well as a safety on defense. You get 2 SPRINTER figures per team. Because of their slim design, they can be devastating as blitzing defensive linemen because they are harder to block.