It's Always Sunny in Philadelphia: Season 3, Episode 2

3 - 2: The Gang Gets Invincible

Mac, Dennis and Dee try out for the Philadelphia Eagles, but seem more interested in outdoing each other. Also trying out for the team is Doyle McPoyle, a brother of the gang's archenemies, Ryan and Liam McPoyle. The entire McPoyle clan shows up to cheer Doyle on, which is not good news for fellow tailgaters Frank and Charlie.