Robert Lee Griffin III (born February 12, 1990), nicknamed RG3 and RGIII, is an American football quarterback who is a free agent.

Griffin played college football at Baylor University, where he won the Heisman Trophy, and was selected second overall by the Washington Redskins in the 2012 NFL Draft.

Griffin had a successful rookie season, setting records for the highest passer rating and touchdown-interception ratio by a first-year quarterback, while leading the Redskins to their first division title since 1999. He received Offensive Rookie of the Year and Pro Bowl honors, but was unable to duplicate his success following a severe knee injury he suffered during the playoffs. Plagued by further injuries and inconsistent performances, Griffin lost his starting position in 2015 to Kirk Cousins, which led to the Redskins releasing him after the season. Griffin signed with the Cleveland Browns the following year, but his tenure was also afflicted with injuries, resulting in his release by the season's end. After spending the entire 2017 season as a free agent, he joined the Baltimore Ravens in 2018 where he served as a backup for three seasons.

In 2021, Griffin became a football analyst for ESPN.