In several episodes a picture of the old Yankee Stadium from before it was renovated in 1973 can be seen in Billy Martin's (John Turturro) office. This is what Yankee Stadium looked like from 1923-1973
In several scenes in Billy Martin's (John Turturro) office, there is an old black and white picture that can be seen on the shelf behind his desk. The picture is of the REAL Billy Martin as a Yankees player with then Yankees manager Casey Stengel.