BYU basketball history, and I’m sure I’ve missed some. I think a win over the Zags tonight would fall toward the bottom end of this list:

#13 Dayton in 1951 NIT Championship game (when NIT was as big or bigger than the NCAA tournament)
#10 St. Louis in 1951 NIT Semifinal
#9 St John’s in 1951 NIT Quarterfinal
#3 Kansas State 1958 (K-State’s only regular season loss; ended season #1 and lost in Elite 8)
#2 St. Joseph 1965, 20-pt win
2 wins over Final Four-bound utah, 1966
NYU 1966 NIT championship game
#9 utah 1981 (last game of regular season)
#10 UCLA in round of 32 1981
#7 Notre Dame in Sweet 16 1981
At #2 UCLA 1981
#8 utah 1991 WAC tournament championship game
UTEP 1992 WAC tournament championship game
New Mexico 2001 MWC tournament champinship game
Florida (3OT) in 1st round 2010 NCAA tournament 2010
2 wins over #4 SDSU 2011
Gonzaga in round of 32 2011
At #3 Gonzaga 2015
At undefeated #1 Gonzaga 2017