text: 1912–20: Ralph Jones era Before the start of the 1912–13 season, Illinois hired former Purdue head coach, Ralph Jones. During his three seasons in West Lafayette, Jones compiled a 32–9 record, while also winning the previous two Western Conference titles. During his first season with Illinois, Jones led the Illini to a 10–6 record which was Illinois' second 10-win season in school history.
  During the 1914–15 season, Illinois won their first-ever Big Ten title, going 16–0 (12–0). They were retroactively declared champion of that season by the Helms Athletic Foundation and the Premo-Porretta Power Poll. They would earn another Big Ten title during the 1916–17 season, sharing it with Minnesota.
  1936–47: Douglas Mills era
  Before the start of the 1936–37 season, Douglas R. Mills began acting as the head coach and athletic director of the Illinois men's basketball team. In his first season, the Illini finished with a 14–4 (10–2) record, which was good enough to share the Big Ten title with Minnesota.
  Before World War II broke out, the Fighting Illini men's basketball program had achieved a status that had never been seen prior. Mills grouped a team of players, all around 6-foot-3, into a nearly undefeatable lineup later known as the "Whiz Kids". The 1941–42 freshman and sophomore lineup of Arthur Smiley, Ken Menke, Andy Phillip, Gene Vance, Victor Wukovits, and Art Mathisen dominated the Big Ten by posting a 13–2 conference record and winning the conference title outright. It would be their first unanimous Big Ten championship since 1915.