The NCAA Tournament expanded to 64 teams in 1985 (and to 65 in 2001). The NCAA record book defines an "upset" as when the winner was seeded five spots or worse than the team it defeated, but that includes No. 11s beating No. 6s and No. 12s beating No. 5s. Frankly, those are too prevalent. Here's a look at real NCAA upsets, when a No. 13, 14 or 15 wins in the first round:
NO. 13 SEEDS WHO HAVE WON
2006: Bradley over Kansas 77-73. Bradley built a 14-point lead early in the second half, then held on in Auburn Hills, Mich. It was Kansas' second consecutive first-round loss to a double-digit seed. Bradley lost in the Sweet 16.
2005: Vermont over Syracuse 60-57 (OT). T.J. Sorrentine hit a 3-pointer from 28 feet as the shot clock was expiring with 1:10 left in overtime to lift the Catamounts in Worcester, Mass. Syracuse committed 24 turnovers. Vermont lost in the second round.
2003: Tulsa over Dayton 84-71. Jason Parker (10 of 13 from the floor) and Dante Swanson (8-for-15 from 3-point range) scored 24 points apiece to lead Tulsa in Spokane, Wash. The Golden Hurricane lost in the second round.
2002: UNC-Wilmington over USC 93-89 (OT). UNC-Wilmington built a 19-point lead, then saw USC storm back to force overtime in Sacramento, Calif. But the Seahawks scored 13 points in overtime to gain the victory, with a dunk by Stewart Hare over seemingly the entire USC team the most memorable moment. UNCW lost in the second round.
2001: Indiana State over Oklahoma 70-68 (OT). Indiana State rallied from a 13-point second-half deficit to take out the Sooners in Memphis. It was the fifth first-round loss in seven seasons for Oklahoma and the first NCAA victory in 22 seasons for Indiana State, which lost in the second round.
2001: Kent State over Indiana 77-73. Trevor Huffman scored 24 points, including 11 of his team's final 15, to lead the Golden Flashes in San Diego. It was the Hoosiers' fifth first-round loss in seven seasons. Kent State lost in the second round.
1999: Oklahoma over Arizona 61-60. Ryan Humphrey's tip-in with 21 seconds left gave the Sooners the victory in Milwaukee. It was Arizona's fourth opening-round loss to a double-digit seed in the 1990s. OU lost in the Sweet 16.
1998: Valparaiso over Ole Miss 70-69. Bryce Drew, the son of Valpo's coach, hit a 3-pointer at the buzzer for the Crusaders in Oklahoma City. With 2.5 seconds remaining, Valparaiso's Jamie Sykes threw a long pass from the baseline past midcourt to Bill Jenkins, who sent a touch pass to Drew. Valpo lost in the Sweet 16 and hasn't won an NCAA game since.
1996: Princeton over UCLA 43-41. Gabe Lewullis scored on a backdoor layup with 3.9 seconds left as the Tigers shocked the defending national champs in Indianapolis. Princeton lost in the second round.
1995: Manhattan over Oklahoma 77-67. Reserve Jeronimo Bucero scored 14 second-half points, including three 3-pointers, as the Jaspers controlled the second half in ousting the Sooners in Memphis. Manhattan lost in the second round.
1993: Southern U. over Georgia Tech 93-78. The run-and-gun Jaguars outscored Tech 54-34 in the second half en route to the decisive victory in Tucson, Ariz. Southern coach Ben Jobe used the opportunity to blast TV analysts who predicted a Tech rout: "A lot of them were coaches who couldn't coach their way out of the toilet." Southern lost in the second round.
1992: Southwestern Louisiana over Oklahoma 87-83. The Ragin' Cajuns hit 12 free throws in a row down the stretch to pull the upset in Tempe, Ariz. Five players hit both ends of one-and-one attempts in the final 1:48, including four free throws in a row by Eric Mouton in the final 11 seconds. Southwestern Louisiana lost in the second round.
1989: Middle Tennessee over Florida State 97-83. Freshman reserve Mike Buck hit six 3-pointers – five in the second half – and scored 26 points as MTSU rallied for the victory in Nashville. Buck was 7-for-7 from the floor and 6-for-6 from the line. MTSU lost in the second round.
1988: Richmond over Indiana 72-69. The Spiders took a 10-point lead early in the second half, then held on thanks to a late basket by Rodney Rice. IU missed a 3-pointer at the buzzer in Hartford, Conn. Richmond lost in the Sweet 16.
1987: Xavier over Missouri 70-69. Byron Larkin scored 19 of his 29 points in the second half as the Musketeers prevailed in Indianapolis. Missouri's Lynn Hardy hit a 3-pointer with 13 seconds left, but Xavier ran out the clock when Missouri was unable to foul. Xavier lost in the second round.
1987: Southwest Missouri State over Clemson 65-61. Winston Garland had 24 points, and the Bears' slowdown offense bothered Clemson in the upset in Atlanta. Southwest Missouri State lost in the second round.
1985: Navy over LSU 78-55. Vernon Butler scored 20 points and David Robinson added 18 as Navy - making its first NCAA appearance since 1960 - crushed LSU in Dayton, Ohio. Navy lost in the second round.
NO. 14 SEEDS WHO HAVE WON
2006: Northwestern State (La.) over Iowa 64-63. Jermaine Wallace hit a 3-pointer with one second left from deep in the corner for the Demons, who rallied from a 16-point second-half deficit in Auburn Hills, Mich. Northwestern State lost in the second round.
2005: Bucknell over Kansas 64-63. Bucknell center Chris McNaughton banked in a jump hook from the lane with 10.5 seconds for the winning basket, then Kansas forward Wayne Simien missed a foul-line jumper at the buzzer in Oklahoma City. Bucknell lost in the second round.
1999: Weber State over North Carolina 76-74. Harold "The Show" Arceneaux hit five 3-pointers and scored 36 points to lead the upset in Seattle. Weber State was 14 of 26 from 3-point range, including 7-for-10 in the second half. UNC's string of 18 consecutive first-round victories snapped. Weber State lost in the second round.
1998: Richmond over South Carolina 62-61. Jarod Stevenson scored 24 points, including two free throws with 1:29 left in Washington, D.C., as the Gamecocks fell in the first round as heavy favorites for the second year in a row. In 1997, No. 2 South Carolina was eliminated by No. 15 Coppin State. Richmond lost in the second round.
1997: UT-Chattanooga over Georgia 73-70. UTC jumped out to a 20-2 lead, then held off the Bulldogs down the stretch in Charlotte. It was the last game at Georgia for Tubby Smith, who became Kentucky's coach a little less than two months later. UTC lost in the Sweet 16. It is one of just two No. 14 seeds to make it that far.
1995: Old Dominion over Villanova 89-81 (3OTs). Petey Sessoms scored seven of his 35 points in the third overtime in Albany, N.Y., as the Monarchs won one of the longest games in tourney history. ODU lost in the second round.
1995: Weber State over Michigan State 79-72. Weber State took the lead early in the second half in Tallahassee, Fla., and held on in Michigan State coach Jud Heathcote's last game. Weber State lost in the second round.
1992: East Tennessee State over Arizona 87-80. ETSU was 13 of 25 from 3-point range to oust the Wildcats in Atlanta. "I don't know if we could shoot them any better than we did tonight," Bucs coach Alan LeForce told reporters afterward. ETSU lost in the second round.
1991: Xavier over Nebraska 89-84. Xavier shot 54 percent from the field to upset the Huskers in Minneapolis. Xavier lost in the second round.
1991: Penn State over UCLA 74-69. Forwards James Barnes (19 points) and DeRon Hayes (16) dominated in the low post in Syracuse, N.Y., as the Nittany Lions won their first NCAA Tournament game in 36 years. Penn State was eliminated in the second round.
1990: Northern Iowa over Missouri 74-71. Maurice Newby hit a long 3-pointer at the buzzer in Richmond, Va., for UNI, which almost blew a 12-point lead in the final five minutes. Northern Iowa hit nine 3-pointers against the Tigers, who had been ranked No. 1 for a portion of the regular season. UNI lost in the second round.
1989: Siena over Stanford 80-78. Mark Brown finished off a 32-point performance with two free throws with three seconds left in Greensboro, N.C., for the Saints, who had changed their nickname from "Indians" earlier in the year. Siena lost in the second round.
1988: Murray State over NC State 78-75. Don Mann hit four 3-pointers and scored 16 points and Jeff Martin scored 23 points as the Racers held off the Wolfpack in Lincoln, Neb. Murray State was making its first NCAA appearance since 1969, but took control in the second half and kept its lead down the stretch. "This is what collegiate sports are all about," Racers coach Steve Newton said. "I told 'em to go out tonight and play shirts and skins and see what we can do." Murray State lost in the second round.
1987: Austin Peay over Illinois 68-67. Tony Raye hit the winning free throws with two seconds left for the Governors, who got five 3-pointers and 24 points from starting power forward Daryl Bedford in Birmingham, Ala. Earlier in the day, ESPN's Dick Vitale announced he would stand on his head if the Governors won. They did, and he lived up to his end of the bargain. Austin Peay lost in the second round and hasn't won an NCAA Tournament game since.
1986: Arkansas-Little Rock over Notre Dame 90-83. The Trojans had three players score at least 20 points, led by future NBAer Pete Myers with 29, to stun Digger Phelps' Irish in Minneapolis. UALR was knocked out in the second round and hasn't won a tourney game since.
1986: Cleveland State over Indiana 83-79. The upstart Vikings used a pressing defense and a deep bench in Syracuse, N.Y. to knock Bob Knight out in the first round for the first time in his career. This was the IU season chronicled in the John Feinstein book, "A Season on the Brink." Cleveland State lost to David Robinson and Navy in the Sweet 16 and hasn't been back to the tourney since.
NO. 15 SEEDS WHO WON
2001: Hampton over Iowa State 58-57. Tarvis Williams hit a 4-footer in the lane with 6.9 seconds left to lift the Pirates to the improbable win in Boise, Idaho. The lasting image is of then-coach Steve Merfeld being carried around by Pirates reserve David Johnson, pumping his fists in celebration. An unbelievable-but-true fact: Williams scored on an assist by Marseilles Brown – who was a guard on the Richmond team that won as a No. 14 seed in 1998. Hampton lost in the second round.
1997: Coppin State over South Carolina 78-65. The Eagles took the lead, 55-54, with 6:12 left and steadily pulled away down the stretch for the stunner in Pittsburgh. "They took it to us, and we were passive. We should have been a lot more aggressive," Gamecocks guard B.J. McKie told reporters afterward. Coppin State lost by one in the second round to Texas.
1993: Santa Clara over Arizona 64-61. The Broncos overcame a 25-0 run that spanned the end of the first half and the start of the second, then held the Wildcats without a field goal for more than 15 minutes. Santa Clara missed four free throws in the final 7.5 seconds – including two by Steve Nash – but still hung on to win. The Broncos lost in the second round.
1991: Richmond over Syracuse 73-69. The Spiders never trailed and hit three free throws in the final 21 seconds in ousting Syracuse in College Park, Md. Richmond, which flummoxed Syracuse with a match-up zone, lost in the second round.