1976: Undefeated Season On February 16, 1976, IU defeated Purdue at Mackey Arena 74-71. This victory was IU's 6th in a row over Purdue. The Indiana Hoosiers would go on to finish the Big Ten undefeated at 18-0 for the second season in a row and win their 4th straight Big Ten Championship. The Indiana Hoosiers would also go on to finish the season undefeated at 32-0 and win the school's 3rd National Championship: no other D-1 basketball program has finished a season undefeated since IU did so in 1976. The Hoosiers only lost one game during the 1974–75 and 1975-76 seasons, which has also not been accomplished by any D-1 program since during a 2 season period. 1979: NIT Championship After splitting the regular season series at one win apiece, Indiana and No. 15 ranked Purdue met on March 21, 1979 in the final game of the 1979 NIT Championship. Going toe to toe during this game was Indiana star Ray Tolbert. Tolbert would go on to receive co-MVP honors for the NIT Tournament. Purdue's Joe Berry Carroll would be the main star for the Boilermakers. Indiana squeaked by with a 53–52 win in the first-ever post-season meeting between the Hoosiers and Boilermakers. 1980: NCAA Sweet 16 On March 13, 1980, No. 7 ranked Indiana faced No. 20 Purdue in the 1980 NCAA Sweet 16, held in Lexington. This is the only time the two schools have ever met in the NCAA Tournament. Although Indiana freshman Isiah Thomas scored 30 points, Purdue ultimately won the game 76-69 behind 20 points from Keith Edmonson and Drake Morris. Purdue reached the Final Four before losing to UCLA. PU has not been to the Final Four since 1980. 1981: "Sucker punch" and jackass feud In a game at Bloomington on January 31, 1981 between Indiana and Purdue, Hoosier star Isiah Thomas hit Purdue guard Roosevelt Barnes with a sucker punch. When the two schools played their second game of the season at Purdue on February 7, 1981, Knight claimed a number of derisive chants were directed at him, his wife, and Indiana University. In response Knight invited Purdue athletic director George King on his weekly television show to discuss the matter, but King declined. Therefore, in place of King, Knight brought onto the show a "jackass" (male donkey) wearing a Purdue hat as a representative of Purdue. The 1980–81 Hoosiers would go