Earlier today (Wednesday) Roger Clemens continued his personal war against Brian McNamee who has sworn under oath that Clemens, his former personal training client, took Human Growth Hormone (HGH) a banned substance under Major League Baseball’s collective bargaining agreement. Although the the winner of this feud may never be known, one thing is for sure his public image and marketability may be tarnished for ever.

Forbes.com says Clemens is already found to be of limited use as a pitchman for marketing campaigns and the continued HGH allegations won’t improve his attractiveness to corporate America. While Clemens’ may have had arguably the most productive career for a right handed pitcher his likability has never been on par with his immortal piers like Michael Jordan or Tiger Woods. In 2007, Clemens’ endorsement income was $2.5 million, an industry source says, about half of Derek Jeter’s total.

The fact that Clemens’ career has included stints hated rivals Red Sox and Yankees, fans have never fully embraced his association with either and view him as a mercenary. Not exactly what you’re looking for when trying to associate dependability with your product.

Forbes.com points out that although Clemens’ endorsement resume is not stellar, it has had some short-term successes. Recently, AT&T played off his many false retirements in a spot that spoofed competitors’ dropped calls. That campaign, which coincided with baseball season ended in November prior to the release of the Mitchell report. My guess is like the calls his campaign would too have been dropped had it been scheduled to run later.

Aside from smaller deals with Coca-Cola and AutoNation Clemens’ has been relegated to the minor leagues of endorsements pitching sport specific products and training materials. Although he’s not yet on par with Barry Bonds as far as marketing black list he’s well on his way unless he can some how escape the wrath of the public opinion.