Martin Britt was an England youth international who came to Ewood with a great reputation, apparently he made mince-meat out of the great Tommy Smith in a youth cup semi-final in the mid sixties. He played 8 games in the league without scoring in the 1965-66 season. At the start of the next season he started in the Central League and scored 12 goals in 12 games playing with a knee he had injured early in that season, he had to retire at the age of 21.
One or two other Rovers who had to retire or leave early early because of injuries were- Jimmy Kerr, saw him at Bury before he came to Ewood , he was a real player , could have been a star but he did his knee as well.
Steve Agnew, great at Barnsley, never had a chance at Rovers.
Alan Gilliver, great goalscorer at Huddersfield but came with a bad back, had the operation and couldn't bend at all after that.
One or two nominations for you to think about for worst player- Francis Kopel, Brian Hill, John Coddington ( anybody remember the penalty he took against Palace ? I've never seen anything like it , he had a longer run up than any fast bowler and when he actually got to strike the ball his shot was so soft the goalie could have saved it by throwing his cap on the ball !!! Unbelievably the ref made him take it again because the keeper had moved and he did exactly the same thing, the ball only just made it to the goalkeeper he had to dive forward to save it !!!!!!!!)