BATON ROUGE, La. (AP) -- For the second straight game, LSU's Glen Davis was kept under control on the offensive end. For the second straight game, his teammates picked up the slack.
Mitchell scored 14 of his 19 points in the second half, while Martin had eight of his 15 after the break.
"Tasmin Mitchell has been our most consistent perimeter player," LSU coach John Brady said. "He's playing consistently good. Terry Martin also made some big baskets. They both made baskets out of constructed situations for them."
With the Tigers (13-4, 2-1 Southeastern Conference) leading by one point and less than 5 minutes to play, Martin and Mitchell both hit big shots.
Martin knocked down his fourth 3-pointer of the game to give LSU a 50-46 lead with 4:44 remaining. On the Tigers' next possession, Mitchell hit a 3 that put them ahead 53-46. Mississippi didn't get closer than five points the rest of the game.
"I knew I needed to make a shot," Martin said. "I came off a screen and I was open. Ole Miss was double-teaming Glen. The perimeter guys knew they had to step it up."
Davis took only nine shots and finished with 11 points, the same amount he had in a 65-63 victory over Auburn on Saturday. He came in averaging 19.2 points per game.
"We are down by one and Terry Martin makes an SEC-level play off the dribble and makes a shot," Mississippi coach Andy Kennedy said. "Tasmin Mitchell jumps up and sticks a big shot. During those same trips, we don't even get a shot at the basket."
Two baskets by Mitchell gave LSU a 24-13 lead with 7:36 left in the opening half. The Tigers made just one field goal the rest of the half and had their lead trimmed to 29-23. Williams scored six points in the final 7 minutes as the Rebels got within six at halftime.
The Rebels fell behind 34-25 early in the second half but Curtis hit three field goals as Mississippi got within 37-34.
Mississippi got within one point three times in the second half, the last at 47-46 on a basket by Sanders with 5:08 left before Martin and Mitchell hit the 3-pointers.