Dennis Irwin, who for more than 30 years was a much-in-demand New York jazz bassist and whose recent illness became a rallying point for jazz musicians without medical insurance, died on Monday in Manhattan. He was 56.
The cause was liver failure as a result of cancer, said his son, Michael Irwin.
He died the same day as a benefit concert was presented in his honor, staged by Jazz at Lincoln Center and including performances by Wynton Marsalis, Tony Bennett, Jon Hendricks, Mose Allison, Joe Lovano, Bill Frisell, John Scofield, and many others. Part of the concert's proceeds will go toward Mr. Irwin's medical expenses. The rest, in line with his stated wishes, will go to other musicians in need, through the Jazz Foundation of America, which has helped many uninsured musicians -- including Mr. Irwin -- pay for healthcare.
Two New York City jazz-club benefits in February, one at Smalls and one at the Village Vanguard, also raised money for Mr. Irwin's living expenses and for alternative cancer treatment.
Mr. Irwin's swing was deep and dependable, and he played on more than 500 albums. Since the early 1980s, he had performed almost every Monday night with the Vanguard Jazz Orchestra at the Village Vanguard.