When Moon retired, he held several all-time professional gridiron football passing records. He held the record for most pass attempts, pass completions, passing yards, and touchdowns, all of which have since been broken. Moon's passing yards record of 70,553 was surpassed by Damon Allen of the Canadian Football League's Toronto Argonauts on September 4, 2006. His mark of 435 total touchdown passes was topped by Brett Favre on November 22, 2007, when Favre was playing for the Green Bay Packers. Favre later topped Moon's career completion record on December 23, 2007, and succeeded him as the quarterback with the most pass attempts in professional football history on December 14, 2008 when Favre was playing for the New York Jets.
Moon was born in Los Angeles, California, as the middle child amongst six sisters. His father, Harold, was a laborer and died of liver disease when Moon was seven years old. His mother, Pat, was a nurse, and Warren learned to cook, sew, iron and housekeep to help take care of the family. He decided early on that he could play only one sport in high school because he had to work the rest of the year to help the family. He chose not only to play football but to be a quarterback since he found that he could throw a football longer, harder, and straighter than anyone he knew.
He enrolled at Alexander Hamilton High School, using the address of one of his mother's friends to gain the advantages of a better academic and athletic reputation than his neighborhood high school could offer. He had little playing time until his junior year, when he took over as varsity starting quarterback. In his senior season, they reached the city playoffs, and Moon was named to the all-city team.
He was recruited by a number of colleges, but some wanted to convert Moon to another position as was the norm for many major colleges recruiting black high school quarterbacks. Moon decided to attend West Los Angeles College in 1974–75 where he was a record-setting quarterback. After Moon showed his ability at West L.A., only a handful of four-year colleges showed interest in signing him. Offensive Coordinator Dick Scesniak of the University of Washington, however, was eager to sign the rifle-armed Moon. Moon was adamant that he play quarterback and considered himself to be perhaps a slightly above-average athlete who was either too small, too slow, or not strong enough to play other positions. The Huskies went 11–11 in Moon's first two seasons as a starter, but during his senior year, he led the Don James-coached Huskies to a 27–20 win over the favored Michigan Wolverines in the 1978 Rose Bowl and was named the game's Most Valuable Player on the strength of two short touchdown runs and a third-quarter 28-yard touchdown pass to wide receiver Robert "Spider" Gaines.
Moon's decision to enter the NFL touched off a bidding war for his services, won by the Houston Oilers (which were coached by Hugh Campbell, his former coach in Edmonton). However, Moon had a difficult adjustment period. Even so, he still threw for a franchise-record 3,338 yards in his first season with Oilers in 1984. In 1986, when Oilers head coach Jerry Glanville found ways to best use Moon's strong arm, he began having success. In 1987, a season shortened by a players' strike that eliminated the third week of the regular NFL season, the Oilers posted a 9–6 record. It was the Oilers' first winning season since 1980, when Bum Phillips was the head coach and Ken "The Snake" Stabler was the quarterback. Moon then passed for 237 yards and a touchdown while leading the Oilers to a 23–20 overtime win over the Seattle Seahawks in the wildcard round of the playoffs in his first NFL postseason game.
Before the start of the 1989 season, Moon was given a five-year, $10-million contract extension, which made him the highest-paid player in the National Football League at that time. In 1990, Moon led the league with 4,689 passing yards. He also led the league in attempts (584), completions (362), and touchdowns (33), and tied Dan Marino's record with nine 300-yard games in a season. That included throwing for 527 yards against Kansas City on December 16, 1990, the second-most passing yards ever in a single game. The following year, he again led the league in passing yards, with 4,690. At the same time, he joined Marino and Dan Fouts as the only quarterbacks to post back-to-back 4,000-yard seasons. Moon also established new NFL records that season with 655 attempts and 404 completions. In 1991, Moon threw for a career-high 655 passes.
In 1992, Moon played only 11 games due to injuries, but the Oilers still managed to achieve a 10–6 record, including a victory over the Buffalo Bills in the final game of the season. Moon and the Oilers then faced the Bills again in the first round of the AFC playoffs. Aided by Moon's 222 passing yards and four touchdowns in the first half, Houston built up a 28–3 halftime lead, and then increased it to 35–3 when Buffalo quarterback Frank Reich's first pass of the third quarter was intercepted and returned for a touchdown. The Bills managed to storm back, though, with five unanswered second-half touchdowns to take a 38–35 lead with time running out in the final period. Moon managed to lead the Oilers on a last-second field goal drive to send the game into overtime, but threw an interception in the extra period that set up Buffalo kicker Steve Christie's game-winning field goal. It was the largest comeback victory in NFL history and is now known in NFL lore simply as the Comeback. Moon finished the game with 36 completions for 371 yards and four touchdowns, with two interceptions. His 36 completions remain an NFL postseason record.
As a Houston Oiler, Moon set a franchise record for wins with 70, which stood until Steve McNair broke it in 2004, long after the team had become the Tennessee Titans.
He was traded to the Minnesota Vikings after the season, where he passed for over 4,200 yards in each of his first two seasons, but missed half of the 1996 season with a broken collarbone. The Vikings' starting quarterback job was given to Brad Johnson and Moon was released after he refused to take a $3.8-million pay cut to serve as Johnson's backup. Moon then signed with the Seattle Seahawks as a free agent. After a two-year stint in the Pacific northwest, an aging Moon signed as a free agent with the Kansas City Chiefs as a backup in 1999. He played in only three games in two years with the Chiefs before announcing his retirement in January 2001.
Combining his NFL and CFL stats, Moon's numbers are nearly unmatched in professional football annals: 5,357 completions in 9,205 attempts for 70,553 yards and 435 touchdowns. Even if his Canadian League statistics are discounted, Warren Moon's career is still exceptional: 3,988 completions for 49,325 yards, 291 touchdown passes, 1,736 yards rushing, and 22 rushing touchdowns. Warren Moon also held individual NFL lifetime records for most fumbles recovered (56) and most fumbles made (162), but this was surpassed by Brett Favre in 2010. Moon was in the top five all-time when he retired for passing yards, passing touchdowns, pass attempts, and pass completions.
During his NFL career, Warren Moon was named to 9 Pro Bowl games (1988–1995, 1997). He currently works as a broadcaster for the Seattle Seahawks on both TV and radio. On the radio, he is a play-by-play announcer with former Seattle Seahawks receiver Steve Raible, who is the lead play-by-play announcer and evening anchor/sports anchor for KIRO-TV in Seattle. He was elected into the Pro Football Hall of Fame in 2006, becoming both the first Canadian Football Hall of Famer, first undrafted quarterback, and first African-American quarterback to be so honored; he was elected in his first year of eligibility. The Tennessee Titans retired his number at halftime on October 1 vs the Dallas Cowboys. Moon also holds the little-known record for being the oldest player to throw a touchdown pass in overtime (38 years, 359 days). Moon won his first Super Bowl ring as a broadcaster for the Seattle Seahawks.
Moon married the former Felicia Fontenot Hendricks, who he had known since they were 16 years old, on March 8, 1981. In 1994, a former Vikings cheerleader accused Moon of sexually harassing her and the case was quickly settled out of court. In 1995, Moon was arrested after a domestic violence incident with his wife at their home. Moon was acquitted after his wife testified that she initiated the violence and that he was trying to restrain her. They divorced in 2001 after not living together for 2 years prior to that. They had 4 children together. Moon's daughter, Blair, was a member of Tulane's Women's Volleyball team.
Moon married Mandy Ritter in 2005. They have a son together.
Moon appeared in the film Any Given Sunday in a cameo role as the head coach from New York.
On April 6, 2007, Moon was arrested for suspicion of DUI after being stopped for speeding in Kirkland, a suburb of Seattle. The charges were later reduced to first-degree negligent driving after Moon registered breath-alcohol levels of 0.068 and 0.067 at the police station in the hours following his arrest. Moon pleaded guilty to the negligent driving charge and was sentenced to 40 hours of community service, a $350 fine and drug and alcohol awareness classes.
In March 2011, Moon stepped back in the limelight while working as a "mentor" to Cam Newton, who became the Overall #1 2011 NFL Draft Pick to the Carolina Panthers. Moon publicly stated that Newton was being unfairly criticized for character flaws, lack of experience, and low football IQ and that the only reason that Newton was being targeted by football analysts and sports-writers was because he is African-American.