The NIT - What's this all about?
Teams not qualifying for the NCAA tournament have the opportunity to be invited to one of three other postseason tournaments:
The NIT features a 32-team field chosen right after the NCAA chooses the 68 teams in its tournament.  It awards automatic bids to regular season conference champions who do not otherwise go to the NCAA tournament. Also, the first 4 teams out of the NCAA tournament become automatic 1 seeds in the NIT.

The CBI features 16 teams and the CIT has up to 32 teams exclusively from mid-major leagues or lower (only 20 teams participated in 2018).  The CIT requires teams to have a .500 record or better while the NIT and CBI do not have such a requirement.  The CIT also doesn't place teams in a bracket, opting to place teams in matchups after the previous round has concluded. 

Schools have been known to decline an invitation to the CBI/CIT tournaments due to the lack of interest in playing in a third-tier tournament (e.g., "We're Indiana. We don't play in the CBI.") or the pay-to-play nature of these tournaments.

 
To get a feel for what kind of teams are involved, these were the 2018 participants along with their record and RPI.


The 2018 NIT, CBI and CIT Teams

NIT CBI
CIT
33
Middle Tennessee
CUSA
24-7
83
Utah Valley
WAC
22-10
110
Northern Colorado
Big Sky
22-12
34
USC
Pac-12
23-11
91
South Dakota
Summit
26-8
116
Eastern Michigan
MAC
21-12
38
Louisville
ACC
20-13
122
Eastern Washington
Big Sky
20-14
129
Wofford
Southern
21-12
39
Western Kentucky
CUSA
24-10
124
Canisius
MAAC
21-11
143
San Diego
WCC
18-13
40
St. Mary's
WCC
28-5
139
San Francisco
WCC
18-15
163
Niagara
MAAC
19-13
50
Boise State
Mountain West
23-8
149
Jacksonville State
Ohio Valley
21-12
164
Austin Peay
Ohio Valley
18-14
52
Temple
American
17-15
156
Grand Canyon
WAC
22-11
167
Drake
Missouri Valley
16-16
56
Nebraska
Big Ten
22-10
159
Miami (OH)
MAC
16-17
168
Central Michigan
MAC
19-14
58
Marquette
Big East
19-13
166
Seattle
WAC
20-13
170
Portland State
Big Sky
20-13
59
Utah
Pac-12
19-11
174
Mercer
Southern
18-14
178
St. Francis (PA)
NEC
18-12
60
Vermont
America East
27-7
188
Colgate
Patriot
19-13
186
UTSA
CUSA
19-14
63
Louisiana
Sun Belt
27-6
223
Central Arkansas
Southland
17-16
198
Hartford
America East
19-13
67
BYU
WCC
24-10
229
UT Rio Grande Valley
WAC
15-17
206
Sam Houston State
Southland
19-14
68
Baylor
Big 12
18-14
235
North Texas
CUSA
15-17
209
IPFW
Summit
18-14
69
Rider
MAAC
22-9
239
New Orleans
Southland
15-16
211
Liberty
Big South
20-14
70
Notre Dame
ACC
20-14
267
Campbell
Big South
16-15
219
Louisiana Monroe
Sun Belt
16-15
71
Washington
Pac-12
20-12




230
Lamar
Southland
19-13
72
Oregon
Pac-12
22-12




236
Illinois Chicago
Horizon
17-15
73
Mississippi State
SEC
22-11




238
North Carolina A&T
MEAC
20-14
77
Penn State
Big Ten
21-13




260
Abilene Christian
Southland
16-15
86
Stanford
Pac-12
18-15








88
Oklahoma State
Big 12
19-14








94
LSU
SEC
17-14








95
Boston College
ACC
19-15








102
UC Davis
Big West
22-10








109
Wagner
Northeast
23-9








114
Northern Kentucky
Horizon
22-9








117
Harvard
Ivy
18-13








130
UNC Asheville
Big South
21-12








150
Southeastern Louisiana
Southland
22-11








172
Florida Gulf Coast
Atlantic Sun
23-11








237
Hampton
MEAC
19-15









Automatic bids listed in bold.

Contact: bracketproject@gmail.com