2006
After the 2005 season, Drew Brees was not re-signed (partly due to the injury suffered in the Denver game) by the Chargers, instead signing a large contract that included sizeable guaranteed money with the New Orleans Saints during the 2006 free agency period. Many doubted the Chargers' decision to change quarterbacks as they were a Super Bowl contender, believing that Rivers' inexperience would hinder them. Rivers was named the Chargers' starter going into training camp. Expectations were high for Rivers due to the large amount of talent on the San Diego Chargers' offense and the performance of his peers from the 2004 draft (Eli Manning and Ben Roethlisberger) as starters.
Football Outsiders projected that Rivers would become an NFL star before the 2006 season due to his spectacular completion percentage in college (72% as a senior). After just 5 NFL starts, Rivers was named the second best NFL quarterback under 25 years of age by Sports Illustrated and had numerous comparisons to Dan Marino for his quick release and pocket presence.
On September 11, 2006, Rivers made his NFL start against the Oakland Raiders. Rivers managed the game well despite only passing 11 times, but completed 8 passes, one for a touchdown, in a 27–0 rout of the Raiders. After his first game, Rivers led the NFL in QB rating with 133.9.
The fifth week of the season, the reigning Super Bowl-champion Pittsburgh Steelers came to town, and Bill Cowher's defensive game plan revolved around stopping LaDainian Tomlinson. This game marked a turning point for Rivers, who aided by head coach Marty Schottenheimer's opening of the playbook, led the team in a come-from-behind victory throwing 24-of-37 for 242 yards and two TDs, winning 23–13.
On November 12, 2006, Rivers had the best game of his short career and led the San Diego Chargers to an improbable comeback against the Cincinnati Bengals. Down 28–7 at halftime, Rivers led the Chargers on six drives culminating in touchdowns. After driving in for the Chargers first touchdown after halftime, Nick Hardwick, Rivers' center, reminisced about Rivers, mimicking his southern drawl, "He's yelling 'Y'all don't think we're out of this' to the Bengals. When he said that, I said, 'Shoot, I guess we ain't out of this. Right on.'" Rivers threw for 337 yards and three touchdown passes, while LaDainian Tomlinson scored three of their four rushing touchdowns. San Diego outscored Cincinnati 42–13 in the second half winning the game 49–41, matching the biggest comeback in 23 years for the Chargers.
Then following week against what was considered at the time to be a strong Denver Broncos defense, the Chargers became the first team in history to win back-to-back games after trailing by 17 or more points and also the first team to win four straight when allowing at least 27 points in each game. Rivers led several 4th quarter comebacks in 2006, and posted the league's highest 4th quarter quarterback rating. His performance over the season led to a selection to the 2007 Pro Bowl. After a 14–2 season the Chargers were set to play the New England Patriots in the divisional round of the playoffs. The Patriots won that game, and Schottenheimer lost his job. The Patriots went on to the AFC Championship where they lost to the Indianapolis Colts 38-34.
Read more about this topic: Philip Rivers, Professional Career, San Diego Chargers