The last time there were 3 teams undefeated in February was 1976...

[OrangeXtreme]

The three teams:

Indiana

UNLV

(wait for it)...

Rutgers.

 

[duhu]

Indiana went undefeated and won the national championship

UNLV finished the regular season with one loss and lost in the second round of the tournament.

Rutgers finished the season undefeated and went all the way to the Final Four where they eventually lost to Michigan.

 

[Cowtown]

I mean ... who?

http://www.scarletknights.com/basketball-men/history/unforgettable.asp

 

[SWC75]

I remember it. I wasn't ready for it but I remember it.

 

[orangeinjersey]

the crowd boo'd when Reese mentioned Rutgers lol

 

[Frozen]

There were actually four teams. Western Michigan was mentioned.

 

[duhu]

There were actually four teams. Western Michigan was mentioned.

I think OP meant started 20-0 or better. Western Michigan entered February without a loss but lost on Valentines day for a 19-1 record.

 

[HarrisonJBounel]

The three teams:

Indiana

UNLV

(wait for it)...

Rutgers.

Yeah, without looking, IIRC, Phil Sellers, Ed Jordan, Jammin' James Bailey. They had a nice team.