During the National Championship game against Kentucky, the 3-point shooting rule is not present. This is historically accurate. The first time the NCAA experimented with the shot was 1945. The 3-point shot became popular during the 1967-68 American Basketball Association season. It was not used by the NCAA until 1986. The NBA adopted the shot during the 1979-80 season.
A few of the actors have played in other sports films. Luke was in Friday Night Lights as Boobie Miles, and in starred in the Jackie Robinson biopic. Radcliff was in Monday Night Mayhem. And Jones was a running back in Blue Mountain State.