Selected first overall in the 2003 NFL Draft from the University of Southern California—where he secured the 2002 Heisman Trophy—Carson Palmer arrived in Cincinnati as a prospect capable of redefining the franchise. After remaining on the bench throughout his entire rookie season behind Jon Kitna, Palmer assumed the starting role in 2004 and promptly revolutionized the Bengals into one of the most prolific passing offenses in the National Football League.

Standing at 6 feet 5 inches and weighing 235 pounds, Palmer exhibited a quintessential NFL quarterback physique, characterized by a fluid over-the-top release and exceptional arm strength. Primarily operating from conventional dropback passing formations, he demonstrated proficiency in delivering high-velocity throws into narrow intermediate windows and connecting with Chad Johnson and T.J. Houshmandzadeh on deep vertical routes along the boundary. His arm talent enabled Cincinnati to target all three levels of the field; however, his inclination to remain within the pocket rendered him susceptible to significant interior pressure.

Palmer made his long-awaited debut in 2004, starting 13 games and throwing for 2,897 yards and 18 touchdowns while showcasing the raw arm talent that justified his top pick. His true national breakout came in 2005, when he delivered one of the franchise’s greatest individual passing seasons. Palmer led the NFL with a 67.8% completion rate and set a franchise record with 32 touchdown passes, accumulating 3,836 yards and earning his first Pro Bowl selection. He helped Cincinnati achieve an 11–5 record, its first division title, and a playoff spot in 15 years.

Tragedy struck on his first pass attempt in the 2005 AFC Wild Card Game against Pittsburgh, when a low hit caused a severe knee injury that tore both his ACL and MCL. Palmer made a remarkable recovery and returned for the 2006 season, starting all 16 games and earning his second Pro Bowl selection after throwing for 4,035 yards and 28 touchdowns. He maintained that high volume in 2007, setting a career mark with 4,131 passing yards and 26 touchdowns.

The latter part of Palmer's tenure in Cincinnati was hindered by team-wide roster declines and injuries. An elbow injury restricted him to merely four starts in 2008. He returned in 2009 to lead Cincinnati to a 10–6 record and another AFC North division title, passing for 3,094 yards and 21 touchdowns. Following a disappointing 4–12 season in 2010, during which he threw for 3,970 yards and 26 touchdowns, Palmer became profoundly frustrated with the organization's direction and requested a trade. When management initially declined, Palmer threatened retirement and abstained from the start of the 2011 season before being traded to the Oakland Raiders in October 2011.

With the Bengals (2003–2010), Palmer started 97 regular-season games, throwing for 22,694 passing yards, 154 touchdowns, and 100 interceptions,