Yep. Will Arnett of Arrested Development fame is starring in not just one, but 2 movies with Will Ferrell!

...In Semi-Pro, [Will Ferrell] just got a big Ace to stack the deck with: Will Arnett of Arrested Development fame. He'll be playing the team announcer, and he joins the already solid ensemble of Ferrell, Woody Harrelson, and Andre Benjamin/Andre 3000. Of course, Arnett and Farrell are already working together in Blades of Glory as rival skaters.

I wonder if he'll ever make a Mr. Bananagrabber movie?