I had not figured out yet how to stretch myself and be able to do other things that I wanted to do with my career outside of the show,” Howerton explainedNEED TO KNOWGlenn Howerton revealed during PaleyLive's panel for the 20th anniversary of It's Always Sunny in Philadelphia that he almost quit the show in 2018He said that being an actor,

You can see Glenn Howerton in It’s Always Sunny in Philadelphia, which is now streaming with a Hulu subscription. The show returns for its 17th season on July 9th with its Abbott Elementary crossover episode, so make sure to check it out. The whole gang will be back, and I can safely say we can't wait to see them all together again.

It's Always Sunny In Philadelphia almost lost one of its main and important cast members after its eleventh season, and fans have no idea they almost managed to dodge the bullet.