As North Carolina nears the postseason and creeps closer to clinching the ACC title, performances like the one they got from pitcher Aidan Haugh in a game against Louisville on Sunday are going to become a must. Haugh didn’t necessarily have his best stuff on the afternoon but was able to battle through his start and give the Tar Heels five full innings. “I mean he’s competitive, you can see it out there in him. And he’s got great stuff,” coach Scott Forbes said. “Sometimes when you’re scoring that many runs it’s more of a challenge. You may sit longer. The eight-run inning he sat forever.” Ai…