Agents and teams typically use the NFL Scouting Combine to do more than measure prospects — through conversations, they get a sense of the pending free agent market. This season, the two sides won’t have to think too far back to those conversations. The NFL’s legal tampering window will open March 9, one day after the conclusion of the Combine. Typically, teams have at least a week between when they leave Indianapolis and when free agency begins. The Feb. 14 Super Bowl in Los Angeles and April 2