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Hangovers manager Adam Duffy was the first OILer to have his team logo designed professionally. Duffy set up a contest at 48hourslogo.com after deciding Cliburn's original design wasn't good enough. The logo includes an homage to hangover-inducing beer as the negative space in the H. The oval shape was inspired by the original Green Bay Packers logo. The shadow is that of Vince Lombardi. For reference, below is the original logo that Cliburn "designed" in Photoshop:
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Original Hangovers logo, "designed" in Photoshop