It’s Always Sunny in Philadelphia: Ireland National Baseball Team

Charlie (Charlie Day) wears an Ireland National Baseball Team t-shirt in the “Old Lady House: A Situation Comedy” episode of It’s Always Sunny in Philadelphia (Season 12, Episode 3).

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It’s Always Sunny in Philadelphia: Wish You Were Beer

Mac (Rob McElhenney) wears a Wish You Were Beer t-shirt in “Old Lady House: A Situation Comedy” episode of It’s Always Sunny in Philadelphia (Season 12, Episode 3).

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It’s Always Sunny in Philadelphia: Milwaukee Journal Run for Kids

Mac (Rob McElhenney) wears a Milwaukee Journal Run for Kids t-shirt in the “Mac & Dennis Move to the Suburbs” episode of It’s Always Sunny in Philadelphia (Season 11, Episode 5).

It’s Always Sunny in Philadelphia: Rottweiler and Motorcycle

Mac (Rob McElhenney) wears a t-shirt with a Motorcycle and a Rottweiler on it in “The Gang Gets Racist” episode of It’s Always Sunny in Philadelphia (Season 1, Episode 1).

It’s Always Sunny in Philadelphia: The Best Girls Are From Philly

Dee (Kaitlin Olson) wears a The Best Girls Are From Philly t-shirt in the “Charlie Wants An Abortion” episode of It’s Always Sunny in Philadelphia (Season 1, Episode 2).

It’s Always Sunny in Philadelphia: Bellevue East Jazz Ensemble

Mac (Rob McElhenney) wears a Bellevue East Jazz Ensemble t-shirt in the “Mac and Dennis Buy A Time Share” episode of It’s Always Sunny in Philadelphia (Season 9, Episode 4). He also wears the shirt in Season 8, Episode 8.

It’s Always Sunny In Philadelphia: Îles du Salut?

Charlie (Charlie Day) wears t-shirt that says Salvation Islands? in the “Mac and Dennis Buy A Time Share” episode of It’s Always Sunny In Philadelphia (Season 9, Episode 4). The islands are in the Atlantic Ocean in French Guiana. The shirt was also worn in Season 5, Episode 4.

It’s Always Sunny in Philadelphia: Colorado Royal Gorge

Charlie (Charlie Day) wears a Colorado Royal Gorge t-shirt in the “Mac and Dennis Buy A Time Share” episode of It’s Always Sunny in Philadelphia (Season 9, Episode 4). He also wears the shirt in Season 5, Episode 12 and Season 4, Episode 4.

It’s Always Sunny in Philadelphia: Wisconsin State Football Championships

Mac (Rob McElhenney) wears a Wisconsin State Football Championships t-shirt in “The Gang Tries Desperately to Win An Award” episode of It’s Always Sunny in Philadelphia (Season 9, Episode 3).

It’s Always Sunny in Philadelphia: Fall River Marksmen

Mac (Rob McElhenney) wears a Fall River Marskmen t-shirt in the “Flowers for Charlie” episode of It’s Always Sunny in Philadelphia (Season 9, Episode 8). He also wears the shirt in Season 6, Episode 4.

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