(CBS) White Sox top pitching prospect Lucas Giolito found his best form Thursday night at Triple-A Charlotte and threw a seven-inning no-hitter.

Pitching in the first game of a doubleheader — minor league rules bring seven innings for doubleheader games — Giolito went the distance without giving up a hit. He walked three and struck out three in the Knights’ 4-0 win over the Syracuse Chiefs.

Giolito was acquired by the White Sox in December as part of a deal that sent outfielder Adam Eaton to the Nationals. The White Sox also received pitching prospects Reynaldo Lopez and Dane Dunning in return.

The 22-year-old Giolito made his MLB debut last September with Washington but started this season in Triple-A with Charlotte. He has struggled thus far, with the no-hitter bringing his record to 2-5 with a 5.44 ERA on the season.

Giolito is now 2-2 with a 4.61 ERA in the month of May.

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