New Orleans Saints
Bush's selection by the New Orleans Saints in the NFL Draft generated excitement and celebration among Saints fans. By the end of the week after the draft, Reebok reported receiving over 15,000 orders for Bush's Saints jersey, even though his jersey number with the Saints had not yet been determined. Bush had petitioned the NFL to wear the number 5, which he has worn throughout his high school and college careers. However, in order for him to wear that number, the NFL would have to revise its numbering regulations, which require running backs to wear a number between 20 and 49. Bush was allowed to wear the number 5 during the Saints' minicamp practices pending the NFL's ruling.
On May 23, 2006, the NFL competition committee officially rejected his request. On May 25 it was officially announced that Bush would be wearing number 25, acquired from Saints running back Fred McAfee. Although Bush had earlier pledged to donate a quarter of the money he received from jersey sales to Hurricane Katrina victims if allowed to wear the number 5, he later said he would make that donation no matter what number he wears. As part of the deal with McAfee to wear the number 25, Bush agreed to allocate half the money to charities of McAfee's choosing, the other half going to charities of Bush's choosing. McAfee pledged to donate his share to Katrina victims in his home state of Mississippi.
Bush was second to Peyton Manning in NFL endorsement deals, amounting to roughly US$5 million annually. He signed contracts with Pepsi, General Motors, Adidas, Pizza Hut and the Subway restaurant chain.
Amazed by the warm reception he received from the fans in New Orleans as well as the magnitude of the devastation caused there by Hurricane Katrina, Bush expressed excitement about playing with the Saints and pledged to help the city recover from the hurricane. On May 15, 2006, Bush donated US$50,000 to help keep Holy Rosary High School, a Catholic school for students with learning disabilities, from closing. During training camp, Saints receiver Joe Horn dubbed him "Baby Matrix" because of his seemingly impossible evasive maneuvers (apparently comparing him to the movie The Matrix, which features characters who move faster than humanly possible to dodge bullets).
Bush's rookie season had both ups and downs, although as the season wore on he became more productive and integral to the Saints' surprising success. In the first game of Bush's NFL career, he amassed 141 total yards against the Cleveland Browns. He carried the ball fewer times than his counterpart Deuce McAllister, putting off any speculation that he would immediately supplant McAllister as the starter in New Orleans. The Saints won the game by a score of 19–14. In his team's Week 9 contest against the Tampa Bay Buccaneers, Bush finished the game with minus-5 yards on eleven carries despite the Saints' 31–14 victory. This effort lowered his league-worst rushing average among running backs to only 2.55 yards per carry. However, he finished the midway point of the season with 46 receptions, the most by any running back in the league.
At the midway point of the season, Bush had yet to score a touchdown either receiving or running the ball; however, on November 12, 2006, Bush rushed for his first touchdown from scrimmage on a reverse against the Pittsburgh Steelers. On December 3, Bush tied the Saints' single-game touchdown record, held by Joe Horn, by scoring four touchdowns against the San Francisco 49ers. He gained 168 all-purpose yards as he sparked the Saints to their eighth win of the season. On December 10, Bush scored a 62-yard touchdown against the Dallas Cowboys in Dallas, contributing to the Saints' 42–17 drubbing of the Cowboys in what was expected to be a more competitive matchup that would be important to the playoff race. On December 24, Bush scored a one-yard touchdown on a reverse against the New York Giants. Bush also had a career-high 126 rushing yards on the day. On December 31, Bush scored a one-yard touchdown against the Carolina Panthers but carried the ball only three times, even though backfield counterpart Deuce McAllister did not play. This was because the New Orleans Saints had already clinched the No. 2 NFC seed in the playoffs.
In the NFC Divisional Playoff game on January 13, 2007, Bush ran for 52 yards on twelve carries and scored a touchdown, and added three catches for 22 yards, as New Orleans edged the Philadelphia Eagles 27–24 to earn its first NFC Championship Game appearance in the team's 40-year history. The game was also notable for the vicious hit that Bush absorbed from Sheldon Brown while attempting to catch a swing pass on the Saints' first play of the game. On January 21, in the NFC Championship playoff game, Bush caught a pass on the 22 and ran 78 yards downfield (eluding the Chicago Bears safety) for an 88-yard touchdown thrown by Drew Brees. This comeback was the first score of the second half and closed the gap from 16–7 (in favor of Chicago) to 16–14. That was the last time, however, the Saints would score. The Bears went on to trounce the Saints 39–14 to earn a berth to the Super Bowl.
Bush was fined by the NFL after the game for US$5,000 for taunting: which consisted of wagging his finger at All-Pro linebacker Brian Urlacher and doing a somersault after the 88-yard reception score. Bush apologized immediately after the event.
In the season opener of the 2007 season, Bush and the Saints lost to the defending Super Bowl champion Indianapolis Colts 41–10. Bush was tied for a team-best 38 rushing yards on 12 carries. He also had seven yards on four receptions and a punt return for two yards in a disappointing opener for him and the Saints. Their next game was equally disappointing, as the Saints were beaten 31–14 by the Tampa Bay Buccaneers and Bush averaged 2.7 yards per carry and 27 yards from scrimmage – over a third of which came on one play.
Bush scored two rushing touchdowns, both one-yard runs, in the Saints' Week 3 loss to the Tennessee Titans. In that game, Bush carried seven times for 15 yards while catching six passes for 20 yards. Bush missed the final four games of the 2007 season with a partially torn posterior cruciate ligament in his left knee. Bush finished the season with six total touchdowns and 581 yards rushing, averaging 3.6 yards per carry.
Bush and the New Orleans Saints faced the Tampa Bay Buccaneers to open the 2008 season. With Deuce McAllister out due to injury, Bush started the game. He showed great improvement early in the season, particularly during Week 3 against the Denver Broncos, in which he had 18 carries for 73 yards and two touchdowns, one touchdown that included a run up the middle, cutting back to the outside for 23 yards. He added a second touchdown on a six-yard swing pass from Drew Brees near the goal line. Bush ended the game with eleven receptions for 75 yards and one receiving touchdown.
Since he came into the league, no running back has caught more passes out of the backfield than Bush, who collected 171 receptions in his first two years. On October 6, in a home game against the Minnesota Vikings, he returned two punts for touchdowns and nearly had a third, tying an NFL record for single-game punt returns for touchdowns and becoming the 12th player to do so. In a home game against the Oakland Raiders on October 12, Bush tied the NFL record for fastest time to his 200th catch, doing so in only 34 games.
Bush was injured in the October 19 game against the Carolina Panthers. He had surgery to repair a torn meniscus in his left knee the next day and was expected to miss the next three to four games. Bush returned on November 30 against the Tampa Bay Buccaneers and registered three carries for no yards and five catches for 32 yards in a 23–20 Saints loss. However, one week later he was back on track, producing over 100 yards from scrimmage and a touchdown catch in an important 29–25 home win against the division rival Atlanta Falcons to keep the Saints' slim playoff hopes alive.
On December 11, Bush sprained his medial collateral ligament in his left knee in the Saints' 27–24 overtime loss on the road against the Chicago Bears. Although diagnosed as a sprain, given that it was the same knee he had surgery on earlier in the year – and that the Saints were now out of the playoff picture with only two games left in the 2008 season – Bush was placed on injured reserve, ending his season early for the second year in a row. He finished the season with 404 rushing yards on 106 carries, 440 yards receiving with 52 receptions and nine total touchdowns, playing in ten games. Bush was additionally named First Team All-Pro as a punt returner after finishing the season with 20 punt returns for 270 yards and three touchdowns.
On January 7, 2009, the New Orleans Saints confirmed that Bush had surgery on his left knee, and would require months of rehabilitation. However, Bush was expected to be ready for minicamp in June.
On August 16, 2009, Bush left practice due to continuing problems with his left knee, later to return with his knee wrapped in an icepack. Bush and the Saints said that he iced the knee as a precaution. Bush missed the last three games of the 2009 preseason due to a calf injury and to rest his surgically repaired knee. Team officials called it precautionary in nature and stated that Bush would be ready to play during the regular season.
Bush missed games in Weeks 11 and 12 of the regular season due to soreness in his surgically repaired knee. He also missed most of game 15 due to a minor hamstring injury.
Bush experienced career lows in every major category for the 2009 season. While he had eight total touchdowns, good for third on the team, Bush was used sparingly during the year due to Mike Bell and Pierre Thomas dominating the backfield carries. Bush ended the year playing in 14 games with 70 carries for 390 yards and five touchdowns, and 47 receptions for 335 yards and three touchdowns.
On January 16, 2010, in the NFC divisional playoff game against the Arizona Cardinals, Bush had one of the best games of his professional career. He rushed for 84 yards on only five carries, including a 46-yard touchdown run. This play was the longest run by a New Orleans Saints player in the postseason. He also added an 83-yard punt return touchdown late in the third quarter, the Saints' last score in their 45–14 win.
In the NFC Championship Game against the Minnesota Vikings on January 24, Bush had only eight yards rushing on seven carries with two receptions for 33 yards, and he fumbled a punt return. However, one of his receptions was a late touchdown that helped the Saints win their first NFC championship and their first Super Bowl appearance and eventual victory in franchise history.
On February 7, 2010, Bush won his first Super Bowl with a 31–17 win over the Indianapolis Colts in Miami.
Bush's 2010 season was overshadowed by the controversy over his Heisman Trophy, as well as other matters related to his years at USC. During the second regular-season game, a Monday Night Football contest with the San Francisco 49ers, he was injured while returning a punt. He did not return to the game. The injury was diagnosed as a broken bone in his right leg and he was expected to miss at least six weeks. He returned on Thanksgiving Day to play against the Dallas Cowboys. Overall, he finished the 2010 season with 150 rushing yards and 34 receptions for 208 yards and a receiving touchdown.