Actually, Jerry Orbach's title, as awarded by the Drama League, was "having appeared in more performances of American musicals than any other living actor." Of course, that was at the time.
That doesn't 'exactly' say he never missed a performance, but I'm pretty sure that was at least part of what they ment.
"Who is Stephen Sondheim?" -roninjoey
"The man who wishes he had written Phantom of the Opera!" - SueleenGay
GO CARDINALS!!!