Travis McConico added 14 points and Jordan Jones 10 for the Buccaneers (12-14, 7-8 Big South), who swept the season series from the Lancers (6-22, 3-12). Charleston Southern was only 3 of 12 from the arc but outscored Longwood 46-28 in the paint even though outrebounded 40-39.
Trailing by two at halftime, the Buccaneers got 11 points each from Mitchell and McConico in the second half with a 9-0 run capped by five straight points from Phlandrous Fleming snapping a 50-all tie. A jumper from Cortez with 3:09 remaining gave Charleston Southern a double-digit lead for good at 69-58.
Jim Calhoun, who has a career record of 873-380 and led UConn to three national titles before retiring in 2012, has been hired as coach at Saint Joseph.
Pac-12 commissioner Larry Scott believes a tentative ruling making show-cause orders illegal in California would threaten NCAA membership for state schools.
Guard James Bouknight, ranked 87th in the ESPN 100, is the first player from the Class of 2019 to commit to UConn and first-year coach Dan Hurley.