A few days ago I posted the top 20 players by their adjusted Corsi rate. This uses the adjustment scheme used by behind the net which adjusts rates by comparing the values obtained when a player is on the ice compared to when they are off of them. I think this is a very good list for finding ineffective NHL players. Rate lists often select players who play in a limited role. Players who struggle and have poor Corsi ratings in limited ice time are not very good hockey players. On the flip side, it is not as clear that players who have good Corsi rates in limited situations are top players because they may not do as well in more expanded roles.
In order to have a meaningful adjustment, I have limited this list to players who played 50 or more games in 2010/11. Here are the worst 20 adjusted Corsi rates in 2010/11: