Paul Shaffer could have played the role of George Constanza on "Seinfeld."

"In his new book.... [he] reveals he was offered the role of George Costanza before it went to Jason Alexander. Seinfeld handpicked Shaffer for the role and told him, 'There’s no audition ... You’ve got the part. Just call us back!' Shaffer never responded — the music man says he was too busy to accept the role."