Orenthal James Simpson (born July 9, 1947), nicknamed "the Juice", is an American former football running back, broadcaster, actor, and advertising spokesman. Once a popular figure with the U.S. public, he is now best known for being tried for the murders of his former wife, Nicole Brown Simpson, and her friend Ron Goldman. Simpson was initially acquitted of the murders in criminal court but was later found responsible for both deaths in a civil trial.

Simpson attended the University of Southern California (USC), where he played football for the USC Trojans and won the Heisman Trophy in 1968. He played professionally as a running back in the National Football League (NFL) for 11 seasons, primarily with the Buffalo Bills from 1969 to 1977. He also played for the San Francisco 49ers from 1978 to 1979. In 1973, he became the first NFL player to rush for more than 2,000 yards in a season. He holds the record for the single-season yards-per-game average, which stands at 143.1. He was the only player to rush for over 2,000 yards in the 14-game regular season NFL format. Simpson was inducted into the College Football Hall of Fame in 1983 and the Pro Football Hall of Fame in 1985. After retiring from football, he began new careers in acting and football broadcasting.

In 1994, Simpson was arrested and charged with the murders of his ex-wife, Nicole Brown Simpson, and her friend, Ron Goldman. He was acquitted by a jury after a lengthy and internationally publicized trial. The families of the victims subsequently filed a civil suit against him. A civil court awarded a $33.5 million judgment against him in 1997 for the victims' wrongful deaths. In 2000, Simpson moved to Miami, Florida to avoid paying on the liability judgment, which as of 2021 remained mostly unpaid.

In 2007, Simpson was arrested in Las Vegas, Nevada, and charged with the felonies of armed robbery and kidnapping. In 2008, he was convicted and sentenced to 33 years' imprisonment, with a minimum of nine years without parole. He served his sentence at the Lovelock Correctional Center near Lovelock, Nevada. Simpson was granted parole on July 20, 2017, which was the minimum sentence. He was eligible for release from prison on October 1, 2017, and was released on that date. On December 14, 2021, Simpson was granted early release from his parole by the Nevada Division of Parole and Probation.