It has evolved over the years and gained national recognition in the 1990s when Ellerson was defensive coordinator under Dick Tomey at the University of Arizona. Linebackers Tedy Bruschi (New England Patriots), Antonio Pierce (New York Giants) and Lance Briggs (Chicago Bears) all became playmakers and professional prospects while playing in the system, which was famously nicknamed "Desert Swarm" at Arizona.
Arizona led the nation in scoring defense in 1992,...
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