Ever heard of Joe Grushecky?

Music critics place him among the best rock and rollers ever.

Over the past two decades, he's raised hundreds of thousands of dollars for all kinds of causes, including headlining a sold-out (in 57 minutes!) "Flood Aid" benefit concert last December in Pittsburgh with his good buddy Bruce Springsteen.

He's a musician, singer, songwriter, record producer, music arranger, recording artist -- and he leads what's been described in top music publications as "one of the best bar bands in America." Moreover, a song he co-wrote with Springsteen recently won a Grammy for best solo rock vocal performance ("Code of Silence").

Do you know him? Probably not.

CNN.com - Rock's best-kept secret - Mar 2, 2005