Gregor Alan Olson (born March 1, 1963) is an American football coach who is the senior offensive assistant with the Los Angeles Rams of the National Football League (NFL). He has been an offensive coordinator for six different National Football League (NFL) teams, the Detroit Lions from 2004 to 2005, the St. Louis Rams from 2006 to 2007, the Tampa Bay Buccaneers from 2008 to 2011, the Oakland Raiders from 2013 to 2014, the Jacksonville Jaguars from 2015 to 2016, and the Oakland / Las Vegas Raiders from 2018 to 2021. During 2017, Olson served as the Los Angeles Rams quarterbacks coach replacing Chris Weinke. In 2018, Olson returned to Oakland to be their offensive coordinator, reuniting him with former mentee quarterback Derek Carr.