With less than two weeks to go before Selection Sunday, SI.com's Stewart Mandel says the tournament field is already pretty tight. Here's his mock bracket based on results through March 2. For purposes of his bracket, the current first-place team in each conference was awarded the automatic berth. No attempt was made to predict future results.

EAST (Charlotte)
(1) North Carolina vs. (16) Lamar/Alabama St.
(8) Baylor vs. (9) Arizona
(5) Vanderbilt vs. (12) UAB
(4) Purdue vs. (13) Villanova
(6) Drake vs. (11) Texas A&M
(3) Georgetown vs. (14) Boise St.
(7) Miami vs. (10) South Alabama
(2) Xavier vs. (15) American

MIDWEST (Detroit)
(1) Tennessee vs. (16) Morgan St.
(8) St. Mary's vs. (9) Oklahoma
(5) Washington St. vs. (12) Maryland
(4) Connecticut vs. (13) Siena
(6) Butler vs. (11) West Virginia
(3) Wisconsin vs. (14) Belmont
(7) Clemson vs. (10) Arizona St.
(2) Kansas vs. (15) Robert Morris

SOUTH (Houston)
(1) Memphis vs. (16) UNC Asheville
(8) Kansas St.  vs. (9) Kentucky
(5) Michigan St. vs. (12) Kent St.
(4) Notre Dame vs. (13) Davidson
(6) Gonzaga vs. (11) Southern Illinois
(3) Stanford vs. (14) Maryland-Baltimore County
(7) Pittsburgh vs. (10) UNLV
(2) Duke vs. (15) Cal-State Northridge

WEST (Phoenix)
(1) UCLA vs. (16) Portland St.
(8) BYU  vs. (9) Arkansas
(5) Marquette vs. (12) Virginia Commonwealth
(4) Indiana vs. (13) Oral Roberts
(6) USC vs. (11) Massachussetts
(3) Louisville vs. (14) Cornell
(7) Mississippi St. vs. (10) Illinois St.
(2) Texas vs. (15) Austin Peay