Lawson has missed the past three games with a jammed right big toe. He hurt himself just before the regular-season finale against Duke.
Coach Roy Williams had said it would be a gametime decision whether the Atlantic Coast Conference player of the year would suit up against LSU.
Lawson averages about 16 points per game for the Tar Heels, the top seed in the South Region.
(This version CORRECTS APNewsNow. corrects dateline to Greensboro)
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After a beautiful day that made for perfect scoring conditions, some weather is moving into the British Open. That has some potential to cause problems for the leaders, who are on the back nine as the wind is picking up and a few raindrops are coming down.
UEFA has ordered Hajduk Split to play its next Europa League home game in an empty stadium as punishment for racist chants by fans.
Brooks Koepka hasn't missed a beat since winning the U.S. Open last month. On Thursday, he barely missed a shot as he used an eagle on the 17th hole to shoot 5-under-65 and move into a tie for the lead with Jordan Spieth in the British Open.