Tim McGraw will soon be a doctor of humanities. McGraw, a Delhi, La., native, will receive an honorary doctorate Saturday from the University of Louisiana-Monroe, where he was once a student. “I feel very humbled to be receiving this honorary degree,” McGraw said. “It will be good to be home and have my family there with me.” The 34-year-old singer has a history of philanthropy in north Louisiana and elsewhere. In 1994, he organized the first Swampstock, which began as a softball game to raise funds for Little League in Rayville. Swampstock now consists of a celebrity softball game and a concert, with attendance of more than 11,000. Last year, McGraw and his wife, Faith Hill, performed at a benefit concert for the Friends of the Jackson Zoo in Jackson, Miss., helping raise funds that were used to build a new education complex and supported other Friends projects.