The Dragons (8-6, 0-1) came within seven on a pair of Tavon Allen free throws with under two minutes to play before Thornton finished out the scoring with a 3-pointer and two from the line for the Tribe.
Tavon Allen had 15 points for Drexel (8-5) and Chris Fouch added 13.
Drexel lost to Buffalo 55-52 in a see-saw contest on Sunday.
A major key to Drexel’s success this season patrols the low post – senior forward Dartaye Ruffin.
Chris Fouch scored 15 points to help Drexel hold off St. Francis, 59-49 in a battle of Pennsylvania rivals Sunday.
Halil Kanacevic scored a career-high 27 points to go with 14 rebounds and Saint Joseph’s enjoyed a huge second half in taking a 75-55 victory over Drexel on Wednesday night.
Frantz Massenat scored 21 points to lead Drexel over Tennessee State 75-61 on Saturday.
Nick Johnson scored 20 points and freshman Aaron Gordon had 10 points and 13 rebounds and No. 4 Arizona rallied from a terrible first half to beat Drexel 66-62 on Wednesday night in the semifinals of the NIT Season Tip-Off.
Drexel coach Bruiser Flint was all smiles despite a 72-67 loss to No. 22 UCLA.
Hollie Mershon hit the winning layup with 20.6 seconds remaining to lift Drexel over Utah 46-43 on Saturday in the Women’s NIT championship game.
George Mason beat Drexel 60-54 on Saturday in the quarterfinals of the Colonial Athletic Association tournament.
Drexel pulled away to beat UNC Wilmington 62-46 Saturday night in the season finale for both teams.
Damion Lee scored a career-high 34 points with 10 rebounds as Drexel held off Old Dominion 81-77 Thursday night.
George Mason rallied from an eight-point deficit and held on to defeat Drexel 68-62 Thursday night, splitting the season series.
Franz Massenat scored 14 points and Derrick Thomas scored 13 to help Drexel defeat James Madison 60-48 Sunday night.