-Q: When you were playing, did you ever miss camp time due to a contract situation?

-SINGLETARY: Absolutely.

-Q: What was the longest time you missed?

-SINGLETARY: Maybe three weeks.
 
-Q: Was that your rookie year or was it when you were a veteran?
 
-SINGLETARY: My rookie year of course I was drafted in the second round and thought that I should’ve been in the first round. So yes, I held out for a week.
 
The second time I held out was after my fifth year, actually, before my fifth year, the year we went to the Super Bowl. And the general manager and myself had a conversation during negotiations and it worked out totally different than he thought it was.
  
I’m a guy of principle. I was prepared to sit out for the whole duration. But it worked out, thank God for that.

emphasis added

http://blogs.mercurynews.com/kawakami/2009/07/28/singletary-day-1-transcript-understanding-crabtrees-situation-ruling-out-vick/