Harold Warren Moon (born November 18, 1956) is an American former professional football quarterback who played for 23 seasons.

Moon also played for the NFL's Minnesota Vikings, Seattle Seahawks, and Kansas City Chiefs.

Moon spent 10 seasons with the Oilers, whom he led to seven playoff appearances, and made an eighth postseason run with the Vikings before retiring in 2000.

At the time of his retirement, Moon held several all-time professional gridiron football passing records.

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.

However, offensive coordinator Dick Scesniak of the University of Washington in Seattle, was eager to sign the rifle-armed Moon.

[9] Under new head coach Don James, Washington was 11–11 in Moon's first two seasons as a starter, but as a senior in 1977, he led the Huskies to the Pac-8 title and a 27–20 upset win in the Rose Bowl over Michigan.

Having barely made the playoffs (which they would have missed altogether if not for a loss by the Calgary Stampeders to the last place Saskatchewan Roughriders in the last week of the regular season), Moon's Eskimos were throttled in Winnipeg by the Blue Bombers in the West semi-final.

In 2006, he was ranked fifth on a list of the greatest 50 CFL players presented by Canadian sports network TSN.

Moon's decision to enter the NFL touched off a bidding war for his services, won by the Houston Oilers, led by Hugh Campbell, his head coach for his first five seasons in Edmonton.

[17] When new head coach Jerry Glanville found ways to best use Moon's strong arm in 1986, the team began having success.

In his first postseason game in the NFL, Moon passed for 237 yards and a touchdown in the Oilers' 23–20 overtime victory over the Seattle Seahawks in the wildcard round of the playoffs.

Prior to the 1989 season, Moon signed a five-year, $10-million contract extension, which made him the highest-paid player in the NFL at that time.

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.

The Bills stormed back with five unanswered second-half touchdowns to take a 38–35 lead with time running out in the final period.

Despite a drama-filled 1–4 start and early struggles from Moon, Houston went 12–4 and won the AFC Central division crown but lost to Joe Montana and the Kansas City Chiefs 28–20 in the divisional round of the playoffs.

[25][26][27] Moon set a franchise record with Houston for wins with 70, which stood until Steve McNair broke it in 2004, long after the team had become the Tennessee Titans.

[39] 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.

The Tennessee Titans retired Moon's number at halftime on October 1, 2006, in a game against the Dallas Cowboys.

[44][45] Moon has mentored Cam Newton, the first overall pick of the 2011 NFL draft, alluding to their common experiences as prominent African-American quarterbacks.