2005 was the highest level of NCAA Division I-A football season college football competition in the United States organized by the National Collegiate Athletic Association (NCAA). The regular season began on September 1, 2005 and ended on December 3, 2005. The postseason concluded on January 4, 2006 with the Rose Bowl, which served as the season's BCS National Championship Game.
The USC Trojans and the Texas Longhorns finished the regular season as the only undefeated teams in Division I-A and consequently met in the Rose Bowl to play for the national title. Texas defeated USC largely due to the performance of quarterback Vince Young, who gained 467 yards of total offense and ran for three touchdowns. The Longhorns won their first national championship since 1970, and their first consensus national title since 1969.
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( January 2012) Rule changes
Seven additional conferences would join the Big Ten in adopting instant replay systems. Conference changes
A major conference realignment occurred prior to the 2005 season, when 18 teams in Division 1-A changed conferences.
Temple was expelled from the Big East Conference while Army ended its brief affiliation with Conference USA, resulting in both schools becoming Independents.
Boston College left the Big East to become the 12th member of the Atlantic Coast Conference (ACC), allowing the league to split into two divisions and hold an annual championship game.
Cincinnati, Louisville and South Florida left Conference USA to join the Big East. Texas Christian University also left Conference USA to become the Mountain West Conference's ninth member.
Despite its losses, Conference USA added six schools to increase its membership to twelve, poaching
Marshall and UCF from the Mid-American Conference and Rice, Southern Methodist, Tulsa, and UTEP from the Western Athletic Conference (WAC). Like the ACC, Conference USA split into two divisions and started a conference championship game.
The Western Athletic Conference added
Idaho, New Mexico State and Utah State from the Sun Belt Conference.
The Sun Belt picked up I-AA Independents
Florida Atlantic and Florida International. Coaching changes
Steve Spurrier as coach at the University of Florida
Steve Spurrier returned to college coaching for the first time since 2001 after a stint in the NFL, leading South Carolina to a respectable 7–5 season. Urban Meyer, after leading Utah to an undefeated season in 2004, took over at Florida (Spurrier's old school). Charlie Weis left the New England Patriots to become head coach at alma mater Notre Dame, taking the team to a BCS bowl.
Longtime head coaches
Barry Alvarez of Wisconsin and Bill Snyder of Kansas State, both of whom took struggling programs to national prominence during their tenures, retired. Dan Hawkins, having helped make Boise State a powerhouse in the Western Athletic Conference, left the Broncos to coach struggling Colorado. Conference standings
Other New Year's Day bowls
December bowl games
Peach Bowl: #10 LSU 40, #9 Miami (FL) 3
Houston Bowl: #14 TCU 27, Iowa State 24
Liberty Bowl: (C-USA Champ) Tulsa 31, Fresno State 24
MPC Computers Bowl: #19 Boston College 27, Boise State 21
Meineke Car Care Bowl: NC State 14, South Florida 0
Independence Bowl: Missouri 38, South Carolina 31
Sun Bowl: #17 UCLA 50, Northwestern 38
Music City Bowl: Virginia 34, Minnesota 31
Holiday Bowl: Oklahoma 17, #6 Oregon 14
Emerald Bowl: Utah 38, #24 Georgia Tech 10
Alamo Bowl: Nebraska 32, #20 Michigan 28
Insight Bowl: Arizona State 45, Rutgers 40
Champs Sports Bowl: #23 Clemson 19, Colorado 10
Motor City Bowl: Memphis 38, (MAC Champ) Akron 31
Hawai'i Bowl: (WAC Champ) Nevada 49, UCF 48 (OT)
Fort Worth Bowl: Kansas 42, Houston 13
Las Vegas Bowl: California 35, BYU 28
Poinsettia Bowl: Navy 51, Colorado State 30
GMAC Bowl: Toledo 45, UTEP 13 New Orleans Bowl: Southern Mississippi 31, (Sun Belt Champ) Arkansas State 19 Awards and honors
Heisman Trophy controversy
Heisman Trophy voting was primarily for three players: Reggie Bush, Matt Leinart (who won the trophy in 2004) and Vince Young. Bush won the trophy, with Young (who helped Texas win their first national championship since 1970) second in the voting:
Reggie Bush, Jr. USC TB (2,541 points)
Vince Young, Jr. Texas QB (1,608)
Matt Leinart, Sr. USC QB (797)
Brady Quinn Jr. Notre Dame QB (191) Michael Robinson, Sr. Penn State QB (49)
In June 2010 the NCAA ruled that Bush had received "improper benefits", violating NCAA policy. On September 14, he announced in a statement from the
New Orleans Saints that he would forfeit his 2005 Heisman Trophy. Runner-up Vince Young said that he would not accept the trophy if Bush forfeited it. On September 15, the Heisman Trust announced that the 2005 trophy would be vacated and there would be no winner for the season.  Major award winners
Walter Camp Award (top player): Reggie Bush 
Maxwell Award (top player): Vince Young, QB, Texas
AP Player Of the Year: Reggie Bush, RB, USC 
Lombardi Award (top lineman/linebacker): A. J. Hawk, Ohio State
John Mackey Award (tight end): Marcedes Lewis, UCLA
Doak Walker Award (running back) 
Chuck Bednarik Award (defensive player): Paul Posluszny, LB, Penn State
Outland Trophy (interior lineman): Greg Eslinger, C, Minnesota
Dave Rimington Trophy (center): Greg Eslinger, Minnesota
Davey O'Brien Award (quarterback): Vince Young, QB, Texas
Johnny Unitas Award (senior quarterback): Matt Leinart, USC
Fred Biletnikoff Award (wide receiver): Mike Hass, Oregon State
Jim Thorpe Award (defensive back): Michael Huff, Texas
Lou Groza Award (placekicker): Alexis Serna, Oregon State
Ray Guy Award (punter): Ryan Plackemeier, Wake Forest
The Home Depot Coach of the Year Award: Joe Paterno, Penn State
Paul "Bear" Bryant Award (head coach): Mack Brown, Texas Broyles Award (assistant coach): Greg Davis, Texas All-Americans
2005 Consensus All-America team
Vince Young 6'5"
Houston, Texas Texas
Reggie Bush 6'0"
Spring Valley, California USC
Jerome Harrison 5'10"
Kalamazoo, Michigan Washington State
Dwayne Jarrett 6'5"
New Brunswick, New Jersey USC
Jeff Samardzija 6'5"
Valparaiso, Indiana Notre Dame
Marcedes Lewis 6'6"
Lakewood, California UCLA
Jonathan Scott 6'7"
Dallas, Texas Texas
Marcus McNeill 6'9"
Decatur, Georgia Auburn
Deuce Lutui 6'6"
Mesa, Arizona USC
Max Jean-Gilles 6'4"
North Miami Beach, Florida Georgia
Greg Eslinger 6'3"
Bismarck, North Dakota Minnesota
Tamba Hali 6'3"
Teaneck, New Jersey Penn State
Haloti Ngata 6'4"
Salt Lake City, Utah Oregon
Rodrique Wright 6'5"
Elvis Dumervil 6'0"
Miami, Florida Louisville
A. J. Hawk 6'1"
Centerville, Ohio Ohio State
DeMeco Ryans 6'1"
Bessemer, Alabama Alabama
Paul Posluszny 6'2"
Hopewell Township, Pennsylvania Penn State
Jimmy Williams 6'3"
Hampton, Virginia Virginia Tech
Tye Hill 5'10"
Dorchester, South Carolina Clemson
Michael Huff 6'0"
Irving, Texas Texas
Greg Blue 6'2"
Atlanta Georgia Highest-scoring team
Texas scored the most points (652).
  References