The winner of Tuesday night's game will advance to play either No. 2 seed Washington State or No. 7 seed Long Beach State later in the week.
Oklahoma State is making its first appearance in the NIT under head coach Travis Ford after playing in the NCAA Tournament each of the past two seasons. The Cowboys nearly upset second-ranked Kansas in the Big 12 quarterfinals before suffering a heartbreaking 63-62 loss to the Jayhawks.
Harvard also suffered a heartbreaking loss or it would have advanced to play in the NCAA Tournament for the first time since 1946. The Crimson lost to Princeton by the same score (63-62) in a one-game playoff for the Ivy League championship on Saturday.
The Crimson finished the regular season with the most overall wins (23) and conference victories (12) in program history and finished tied with Princeton for the regular season Ivy League title. Since the league has no postseason conference tournament, the two teams were forced to play a one-game playoff for the conference's NCAA automatic berth.
Coached by former Duke standout Tommy Amaker, the Crimson do not have a senior on its team and is among the nation's best shooting teams, making 47.7 percent of its shots which ties for 14th best among Division I teams.
The Crimson have five players average better than 10 points a game, and a sixth just below that mark.
Harvard is led by 6-8, 240-pound junior forward Keith Wright, who averages 14.9 points and 8.4 rebounds while shooting a team-best 59 percent from the field.
Other Crimson players who score in double figures are 6-5 guard Christian Webster (13.3 points), 6-5 guard Laurent Rivard (11.1 points and 40.1 percent on three-point shots), 6-7 forward Kyle Casey (10.6 points and 5.9 rebounds), and 6-3 guard Oliver McNally (10.2 points and 44.6 percent on three-pointers).
Point guard Brandyn Curry averaged 9.6 points and a team-best 5.9 assists for the Crimson.
The Cowboys must win three games to advance to the NIT Final Four to be played March 29 & 31 at Madison Square Garden in New York City.