They talk about good chemistry being important to having a winning football team in the NFL.
Well, there isn't any reason why the Vikings won't retain the super chemistry from last year that helped them win the division title.
However, the departures of quarterback Gus Frerotte and center Matt Birk, and the likely exit of safety Darren Sharper, who appears headed to New Orleans or Atlanta, could have some effect.
The team will have to make adjustments after losing an 11-year veteran such as Birk.
Birk, Frerotte and guard Steve Hutchinson were inseparable pals on and off the field. Every day after practice, they spent their rest time playing cards in the equipment room, and there was plenty of football talk.
That combination was so close personally that it had a real effect on winning and losing on the field. All three are very football-smart, and they helped a lot of players.
Sharper was a real leader, one of the most popular players on the team and had close ties to the media because he made himself available all of the time -- so did Birk.
No doubt Frerotte wanted to stay here, and after going 8-3 as a starter last season before being injured, he thought he deserved the No. 1 spot. He was planning to report when the Vikings indicated they were going to pay him his $250,000 reporting bonus. But then the Vikings made the deal for Sage Rosenfels and things changed. Sharper wanted to come back but the Vikings drafted Tyrell Johnson in the second round last year, and they thought he was ready to play.