I remember when Arsenal signed Clive Allen for big money from QPR in 1980, he played a couple of pre-season friendlies and then went to Crystal Palace as part of the Kenny Sansom deal. 62 days as an Arsenal player, it was massively controversial at the time
Here's the story
http://that1980ssportsblog.blogspot.com/2016/09/1980-clive-allen-and-arsenal.html