Frank Del Rocco, 20-year-old junior from Virginia Tech who plays out of Chantilly, won the qualifying medal in the 30th annual Worsham Memorial tournament at Bethesda Country Club yesterday with a two-under-par 68.

Jack Skilling of Chevy Chase, who also will be a junoir at Stanford this year, was three-strokes back with a 71.

In the 14-15 age group, played at Montgomery Village, Brian Lenhard, of Evergreen, son of pro Bruce Lenhard, had a two-under par 69. In the 13-14 class, also at Montgomery Village, Scott Cronin of Springfield had a 77. All matches will be played at Bethesda today.

There will be two 18-hole matches today and Thursday in the championship flight. The 18-hole final will start at '10 a.m. Friday.

In the past 29 years, only seven qualifying medalists have ever gone on to win the Worsham title Deane Beaman, now commissioner of the PGA Tour, accomplished that feat in the 1956 tourney.

DelRocco, one of the early finishers, scrambled at the start. He hit only four greens on the first nine but all on the back nine.

"My irons just weren't working well on the front, although I was driving well. But it all came together on the back nine."