I would imagine one could make the connection with the progress of the team by backing a player who has shown a propensity for injury.
However, that alters the meaning of that phrase slightly since progress stopper, to my mind, implies a player who is older and has lost skills and is playing in front of someone who is missing critical snaps to meet their expectations.
A player with a reputation from the past, riding that and taking away a spot for a younger guy.
I don't believe anyone here doesn't see the skill set of Lee. His injuries are not indicative of a loss of skills. The only progress Lee could have stopped is the contract he signed which straps the team in the future. But with the playing time caveat, it is not near as bad as the one Spencer signed to sit out.
Everybody is disappointed because of this. We all react differently to these types of changes.
This is not Lee's fault, nor Martin's.
If, and this is a huge if, you wish to apply blame, it should go to Jerry for signing a huge contract.