[3] His junior year in 1974, McMillan recorded 110 completions on 179 passing attempts (61%) for 1,525 yards, 17 touchdowns, and five interceptions while also rushing 90 times for 368 yards and four touchdowns, earning unanimous first-team All-Big Sky Conference honors.
[3][2] The 1973 Broncos finished the regular season with a 9–2 record, winning the first Big Sky title in school history.
[4] They were invited to the first-ever NCAA Division II playoffs, where they beat South Dakota 53–10 in the quarterfinals before losing to Louisiana Tech 38–34 in the semifinals.
They lost in the Division II quarterfinals to Central Michigan by a score of 20–6.
[8] McMillan was selected by the Detroit Lions in the fourteenth round, with the 350th overall pick, of the 1975 NFL draft but did not sign with them.