Texas A&M Aggies refers to the students, graduates, and sports teams of Texas A&M University. The nickname "Aggie" was once common at land-grant or "ag" (agriculture) schools in many states. The teams are also referred to as "A&M" or "Texas Aggies," and the official school colors are maroon and white. The mascot is a rough collie named Reveille. The sports teams compete in Division I of the NCAA. Until the dissolution of the Southwest Conference, Texas A&M was a charter member of that conference. The Aggies became members of the Big 12 Conference with its subsequent formation in 1996. On July 1, 2012, they left the Big 12 Conference and joined the Southeastern Conference (SEC). Sports sponsored Texas A&M sponsors 20 varsity programs — nine men's and eleven women's. Football The Texas A&M Aggies claim three national titles and have won 20 conference titles. They have produced two Heisman Trophy winners–John David Crow in 1957 and Johnny Manziel, the first redshirt freshman to ever win the award, in 2012. A&M has had two perfect seasons, having gone undefeated and unscored upon in both 1917 and 1919. The football program experienced a period of little success lasting from 1944 to 1971, when the Aggies won only two conference titles. With Emory Bellard as head coach beginning in 1972, the Aggies returned to prominence with two 10 win seasons during his short tenure. He was replaced by Tom Wilson who had little success at Texas A&M before Jackie Sherrill took over the program. Sherrill won three consecutive conference titles and two Cotton Bowl Classic postseason games. His defensive coordinator, R. C. Slocum, replaced him as head coach in 1989. Slocum finished in the top 25 during 10 of his 14 years at Texas A&M and won 4 conference titles, including the school's only Big 12 title in 1998. Slocum also owns the Aggies' last undefeated season, in 1994, though they were ineligible for the conference title or postseason play due to NCAA sanctions. In late 2002, Dennis Franchione left his position as head coach at the University of Alabama to take over Texas A&M's football program from Slocum. He finished the 2003 season at 4–8. Franchione finished the 2004 regular season with a 7–4 mark and an invitation to the Cotton Bowl Classic, a game the Aggies lost to Tennessee. The 2005 team regressed to 5–6 and defensive coordinator Carl Torbush was