Gavin Hall

Hall, a junior at the University of Texas, fired 65 on Wednesday, to sit one back of Harvey's six-under 64. Now he leads the 2014 U.S. Mid-Amateur winner by a slim margin, and has many other talented players right on his tail.

Harvey, who already has wins in 2015 at the South American Amateur in Peru, as well as the Gasparilla Invitational in Florida, finished his first round going eagle-birdie to shoot 64. On Thursday, the Greensboro, N.C. native posted two-under 33 on the front but didn't make another birdie the rest of the day, dropping a shot with a bogey on the par-5 11th en route to a 69.

Cone, who recently graduated from Virginia Tech, was tied with Hall at 65 after round one, and on Thursday fired a 68 despite bogeying two of his last three holes. Cone closed out his senior year in style for the Hokies, tying for first at the ACC Championship.

Jenkins, a junior at North Carolina who is the three-time reigning Carolinas Amateur champion, used a closing eagle at the par-4 15th to post 65 — the lowest score during the second round.

Another recently graduated senior, University of Virginia's Denny McCarthy, is alone in fifth place two shots back of Hall after a second-round 66.

Twenty-one players are at even-par or better through two rounds, while eight players are within four shots of the lead.