Essex County Club’s Jon Seward had a tough day with a 10-over par 80, but he finished in a tie for 10th place with a three round total of 225.
DiLisio’s St. John’s Prep teammate James Turner, who plays out of Bass Rocks, made the biggest move among locals shooting a 6-over par 76 and finishing in a tie for 29th.
Ferncroft’s John Perkins (240, tie for 47th) and Kernwood’s Matt Bullock (243, 50th) also finished in the top 50.
Lei, a rising junior at Phillips Exeter Academy, felt the talent of the field only added to his accomplishment.
“I was third a couple times (in the Boys Division), but I never played too well those times. Today, I definitely sealed the deal,” Lei said. “I knew I’d have to play good. It’s a strong field, the best players in Massachusetts are here so I had to play solidly. I had to play smart and keep trying.”