Yeah the Metcalf stuff was bad he was a great player, yes he fumbled but it was largely about money. Metcalf was the best all purpose back in the game and the Cards didn't want to pay him.
I've mentioned this before one of my fondest memories of him is a play that according to everything I've ever seen online didn't happen, but I know it did because I saw it so i'm thinking it must have been a preseason game. He returned a punt for a TD, they called it back for a penalty, they punted again and he ran that one back all the way too. Now that I think about it I can't remember if it was a punt or a KO I think a punt, This was mid 70's so 45 years ago now so not surprising I can't remember.
the other one goes back to why he left, Bidwill Sr. We drafted him because Coryell coached against him in college and never forgot how good he was. They went out to lunch, Bidwill was there too. They are all sitting there and Coryell says so Terry how would you feel about playing CB, and Coryell says oh no Terry is my RB no way we're moving him to defense. That's how Senior was, he was NOT a football guy but he had this weird thing about intervening and in bad ways. I read a book about Metcalf later on where he said the first 2 years of his career the only time Bidwill spoke to him was to complain about fumbles or tell him he was too small.
People who didn't follow them back then have no idea how bad it was, Metcalf left us to go to Canada, that was unheard of. Norm Thompson was the first true FA in NFL history, left us. We lost so many good players due to that.