There were, this time last week, two undefeated teams left in the sport. But then Auburn lost at Alabama (before also losing at Florida). So now the only team with a zero in the loss column is San Diego State.

Do the Aztecs have a signature win?

Perhaps not.

But they have beaten the Iowa team that's ranked 19th in the Top 25 And 1 by 10 points, beaten the Creighton team that's beaten the Texas Tech team that's ranked 17th in the Top 25 And 1 by 31 points and beaten the Utah team that's beaten the Kentucky team that's ranked 20th in the Top 25 And 1 by 28 points. Add it up, and San Diego State is 6-0 in Quadrant 1/Quadrant 2 opportunities. So there's some good stuff there. And, either way, 19-0 is 19-0. It, by definition, means San Diego State is taking a 19-game winning streak into Tuesday's game with Wyoming that's scheduled to tip at 11 p.m. ET. If the Aztecs win it -- and they should, as 23-point favorites -- they'll be 20-0 for just the second time in school history.

San Diego State is No. 3 in Tuesday morning's updated CBS Sports Top 25 And 1 daily college basketball rankings. For what it's worth, KenPom projects the Aztecs to be at least 7-point favorites in each remaining game.

Tuesday's Top 25 And 1 rankings

Biggest Movers
Rk
Teams
 
Chg
Rcrd
1 Gonzaga Killian Tillie finished with 22 points and 10 rebounds in Saturday's 92-69 victory over BYU. The Zags have won 12 straight games since losing to Michigan. -- 31-1
2 Baylor Freddie Gillespie finished with 12 points and 15 rebounds in Monday's 61-57 victory over Oklahoma. The Bears will take a 15-game winning streak into Saturday's game at Florida. -- 28-2
3 San Diego St Yanni Wetzell finished with 17 points and 16 rebounds in Saturday's 68-55 victory over Nevada. The Aztecs are 19-0 for the first time since the 2010-11 season. -- 23-5
4 Kansas Devon Dotson finished with 21 points, six rebounds and three assists in Saturday's 66-57 victory at Texas. The Jayhawks lead the nation with seven Quadrant 1 wins. -- 21-9
5 Florida St. M.J. Walker made four 3-pointers and finished with 19 points in Saturday's 83-79 victory at Miami. Florida State is 18-2 in its past 20 ACC regular season games. -- 18-7
6 Louisville Malik Williams got 12 points and seven rebounds off the bench in Saturday's 79-73 victory at Duke. The Cardinals will take a four-game winning streak into Wednesday's game with Georgia Tech. -- 13-7
7 Villanova Jermaine Samuels made four 3-pointers and finished with 19 points in Saturday's 61-55 victory over UConn. The Wildcats will take a four-game winning streak into Tuesday's game with Butler. -- 18-7
8 Dayton Jalen Crutcher buried a 3-pointer at the buzzer Friday to give Dayton a 78-76 victory at Saint Louis. The Flyers will take a seven-game winning streak into Wednesday's game with St. Bonaventure. -- 14-10
9 Seton Hall Myles Powell scored 29 points and eclipsed the 2,000-point barrier for his career in Saturday's 82-69 victory at St. John's. The Pirates are 6-0 in the Big East for the first time in history. -- 14-13
10 Michigan St. Cassius Winston finished with six points, five rebounds and four assists in Friday's 67-55 victory over Wisconsin. The Spartans are 6-1 in the Big Ten and alone atop the league standings. -- 15-13
11 Butler The Bulldogs finished with 17 turnovers and eight assists in Saturday's 79-66 loss at DePaul. Butler will take a two-game losing streak into Tuesday's game at Villanova. -- 10-15
12 West Virginia Oscar Tshiebwe finished with 13 points and 11 rebounds in Monday's 97-59 victory over Texas. The Mountaineers are 10-3 in Quadrant 1/Quadrant 2 opportunities. -- 19-10
13 Duke The Blue Devils missed 19 of the 25 3-pointers they attempted in Saturday's 79-73 loss to Louisville. Duke will take a two-game losing streak into Tuesday's game with Miami. -- 13-11
14 Maryland Jalen Smith finished with 18 points, 10 rebounds and four blocks in Saturday's 57-50 victory over Purdue. All four of Maryland's losses are road losses to top-40 KenPom teams. -- 17-14
15 Oregon Chandler Lawson finished with 16 points and 12 rebounds in Saturday's 64-61 victory at Washington. The Ducks are 5-2 in Quadrant 1 opportunities. -- 21-7
16 Auburn The Tigers missed 19 of the 23 3-pointers they attempted in Saturday's 69-47 loss at Florida. Auburn has dropped its past two games by an average of 20.5 points. -- 13-14
17 Texas Tech Kyler Edwards finished with 22 points and four rebounds in Saturday's 72-52 victory over Iowa State. Three of the Red Raiders' five losses are to teams also ranked in the Top 25 And 1. -- 18-11
18 Memphis D.J. Jeffries finished with 18 points and four rebounds in Thursday's 60-49 victory over Cincinnati. The Tigers are 12-2 without James Wiseman, who quit the team the week before Christmas. -- 20-8
19 Iowa Luka Garza finished with 33 points and seven rebounds in Friday's 90-83 victory over Michigan. The Hawkeyes will take a three-game winning streak into Wednesday's game with Rutgers. -- 22-9
20 Kentucky Nick Richards finished with 17 points and nine rebounds in Saturday's 73-66 victory at Arkansas. The Wildcats' resume features two wins over top-10 KenPom teams and three losses to sub-90 KenPom teams. -- 9-16
21 Houston Quentin Grimes got 10 points and four rebounds off the bench in Saturday's 65-54 victory at Wichita State. The Cougars are 8-1 in their past nine games. -- 28-4
22 Wichita St. The Shockers only shot 30.4% from the field in Saturday's 65-54 loss to Houston. Wichita State will take a two-game losing streak into Tuesday's game at South Florida. -- 16-6
23 Penn St. Lamar Stevens finished with 24 points and three rebounds in Saturday's 90-76 victory over Ohio State. The Nittany Lions have seven wins over top-60 KenPom teams and only one loss outside of the top 35. -- 11-14
24 Illinois Trent Frazier finished with 16 points, five rebounds and three steals in Saturday's 75-71 victory over Northwestern. Illinois will take a four-game winning streak into Tuesday's game at Purdue. -- 24-7
25 Rutgers Jacob Young got 11 points off the bench in Sunday's 64-56 victory over Minnesota. The Scarlet Knights are 8-1 in their past nine games and in second place in the Big Ten standings. -- 16-12
26 Arkansas The Razorbacks missed 18 of the 26 3-pointers they attempted in Saturday's 73-66 loss to Kentucky. Arkansas is 3-3 in Quadrant 1/Quadrant 2 opportunities with zero losses outside of the first two Quadrants. -- 25-7