Breaking down the Vikings salary cap with Brad Spielberger PFF's Salary Cap Analyst offers his thoughts on the Vikings offseason. 1 15 minutes read This week I had the pleasure of interviewing Brad Spielberger, Salary Cap Analyst at Pro Football Focus, to discuss the Minnesota Vikings salary cap outlook and gather his thoughts on the team’s offseason. Spielberger, originally from Chicago, is a graduate of Vanderbilt University and Tulane law school. In 2018, he got his start in the NFL salary cap world. He began working with Jason Fitzgerald for the well-known cap and contract site OvertheCap.com (OTC). Together, they authored a book called “The Drafting Stage: Creating a Marketplace for NFL Draft Picks” which is an in-depth analysis of the NFL Draft since the advent of the rookie wage scale.