The Texas Longhorns joined the Big 12 ahead of the 1996 fall sports season after leaving the Southwest Conference. In the almost 28 years since the Longhorns went through the mid-1990s round of conference realignment, Texas has brought in 29 national championships and 231 Big 12 regular season and tournament titles since joining the league. [Sign up for Inside Texas and get ONE MONTH for $1!] Before the Longhorns join the Southeastern Conference on July 1, Texas has an opportunity to add more Big 12 titles in baseball and rowing, plus national titles in baseball, men’s and women’s golf, softba…