Here are the best photography practices for Banner Design.
Gear Set up
Use a tripod (at one height) and a prime lens to fix the focal distance. Once you have the distance set, mark the placement of where each player will stand. The tripod and focal distance should remain the same throughout the shoot for all players.
Storyboard
Think about where you'd like the players to be positioned in the team banner. Even set up the players, if that helps you visualize.
Shoot!
With the tripod set up, and lens fixed, make sure each player stands on the designated mark. This will insure the exact same distance, per player. Be sure to pose each player for the team banner as well as any individual banner they may want.