  jack louis del rio, jr. (born april 4, 1963) is an american football coach, a former player, and is currently defensive coordinator for the denver broncos of the national football league. del rio played both football and baseball for the university of southern california trojans, and then spent eleven years playing linebacker in the national football league (nfl). he retired from playing in 1996 and went into coaching, serving in a variety of positions for several different nfl teams. in 2003, he was named head coach of the jacksonville jaguars, a position he held until november 29, 2011. in that capacity he set the nfl record for the longest tenure of any coach without winning a division championshipâover eight years.{{cite web|url=http://
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