"Jerry West was an integral part of the Lakers and NBA's success," the letter read, according to ESPN.
"It is a travesty that HBO has knowingly demeaned him for shock value and the pursuit of ratings. As an act of common decency, HBO and the producers owe Jerry a public apology and at the very least should retract their baseless and defamatory portrayal of him."
The show is based off Jeff Pearlman's book, "Showtime: Magic, Kareem, Riley, and the Los Angeles Lakers Dynasty of the 1980s" ... but West's team says his scenes in the show did not appear in the book -- nor did they happen in real life.