Leatherheads -- Clooney tries to recapture the magic

Leatherheads has a great cast, including some notables such as George Clooney, John Krasinski, and Renée Zellweger. Stephen Root and Jonathan Price are also present, giving this movie some great promise. With that caliber of cast, one has high hopes that the movie will shine, and when it doesn't, it merits a little more criticism.
This movie isn't funny. Oh sure, there's a laugh or two in various spots, but overall the dialogue isn't very snappy, and a lot of the jokes fall somewhat flat. It feels like Clooney, who directed the movie, was trying to recapture some of the magic in O Brother by the Coens.
I think a 2 is a little harsh, and a 3 a little generous. So I'm going with 2.5/5.