Footballfigure.net offers a pair of customized team triangles for teams to enter the field to.  They can be used as a standalone introduction piece or pairedd up in the Player Introduction Package.
 
The triangles come with the team's name and mascot name.  They are adorned in the team's colors and are magnetic.  This allows for the pieces to attach to the board.
 
Tell us what team do you want and we will do the rest!