Winfield's Agent Ashanti Webb said Monday that negotiations on an extension recently reached an impasse. He declined to comment on whether this will affect Winfield's attendance at the team's organized practices this spring.
Webb says his "line of communication" with the team remains open.
Winfield will make $6 million in the final season of his current six-year deal. He turns 32 next month. Winfield has said previously he'd like to finish his career in Minnesota.
Fellow starting cornerback Cedric Griffin, who is 26, recently had his contract extended by five years through 2014.