The following is from yesterday's TSN.ca article regarding the NHL's labor grievence against the union: Meanwhile, a certified player agent who represents NHLPA members told TSN the league is also ''threatening'' to file another ''unfair labor practice'' complaint against the NHLPA on the issue of player agents representing replacement players. The NHLPA has indicated to its certified player agents that any agent who would negotiate a contract on behalf of a replacement player next season would be in danger of losing his NHLPA certification. The agent who spoke to TSN said he has been told the league believes that the NHLPA's threat of decertification to the agents is an ''unfair labor practice'' and that the NHL is prepared to file a complaint over it with the NLRB. This is the PA's biggest hammer. Once it is taken away the players will return.