[1] He has written about a wide range of sports including football, basketball, baseball, soccer, golf and mixed martial arts.
[2][3][4] He remained at Football Outsiders until 2011 when he was brought on to write at Grantland, a sports and pop-culture website started by Bill Simmons in affiliation with ESPN.
[5][4] At Grantland, Barnwell frequently wrote columns about the National Football League, including coverage and analysis of the NFL draft, free agency, salary cap, coaching strategy, rule changes, and prop bets.
[6][7][8] While at Grantland he also wrote about the NBA, UFC, Premier League and sabermetrics, and frequently appeared as a guest on The B.S.
[11][12][13] Prior to Grantland's closure, the Grantland NFL Podcast missed several scheduled release dates over a period of two weeks without public explanation, leading to speculation that Barnwell and Mays may have been engaged in a dispute with interim editor Chris Connelly.