The NHL has officially locked out its players as the Collective Bargaining Agreement expired at midnight eastern time Sunday morning. It’s the second time in eight years that the professional hockey league has imposed a lock out on the players. The entire 2004-05 NHL season was lost to that lock out. This year’s labor strife is tied to the economic split between the players and owners. Few talks have been held recently between the two sides. Blues training camp was set to open next Friday, September 21st.