Kentucky announced Thursday that North Carolina State transfer Ryan Harrow has enrolled in summer classes at and will play  basketbal at UK in the 2012-13 season after sitting out a year because of NCAA transfer rules.Uh, that was so two weeks ago.Actually, not quite.Although Harrow declared he was a Kentucky Wildcat on his Twitter account more than two weeks ago, Harrow’s transfer didn’t become official until enrolling in and attending classes this week at UK. According to NCAA bylaw 13.10.9, an institution cannot publicize a prospective NCAA student-athlete until he/she has “signed a National Letter of Intent or accepted written offers of admission and/or financial aid from the institution.” NCAA rules prevent transfers from signing a national letter of intent, so Harrow’s verbal commitment a couple of weeks ago didn’t bind him to the school. Albeit a moot point now, Harrow’s announcement wasn’t official until Thursday. As for the accolades of Harrow, head coach John Calipari got another big-time point guard. A 6-foot-1 guard, Harrow averaged 9.3 points and 3.3 assists as a freshman at North Carolina State last season. He was the Georgia Gatorade Player of the Year as a senior at Walton High School in Marietta, Ga., and was rated the 19th-best prospect and seventh-best point guard by Rivals.com in its 2010 signing class.The full details on Harrow can be read here.Although Harrow will have to sit out all of next season because of NCAA transfer rules, he’ll provide Calipari with a high-caliber scout player that few other programs can boast. Matching up Marquis Teague and Michael Gilchrist with Harrow, a proven collegiate point guard, should speed up the maturation process of Kentucky’s highly touted freshmen. And when the 2012-13 season rolls around, regardless of what happens with Teague, Gilchrist, Doron Lamb or any recruits in the 2012 signing class, Calipari will have a bona fide player ready at the point guard spot.It didn’t become official until Thursday, but chalk this one up as another win for Calipari.