The font is Futura Condensed. In 1997, the team switched to rounded numbers on the jersey to match the font on the helmets. Click on the link below for more information.
Shadow black consend is the highest based font used for the Philadelpha Eagles jerseys
There are many different fonts used for different teams. There is no standardised font for numbers or names. However, there are examples of fonts in the "Related Links" section
PERCIVAL in tiger font
It is a Nike font (Ithaca).
The font that is used on this jersey is Futura Condensed. It was picked out by the marketing department for this group to make the name more recognizable.