PITTSBURGH (AP) — Paul Skenes struck out seven over four-plus innings in his major league debut and Yasmani Grandal hit a go-ahead three-run homer as the Pittsburgh Pirates edged the Chicago Cubs 10-9 on Saturday.

Skenes, the top overall pick in the 2023 draft, showed flashes of why he is considered perhaps the best pitching prospect in a generation. The 21-year-old — who was greeted by a standing ovation by most of the near-capacity crowd, including girlfriend Livvy Dunne — reached 100 mph on 17 of his 84 pitches.

He was electric at times but hardly perfect. Skenes allowed at least one runner in every inning he started — including a solo homer by Nico Hoerner in the fourth — and was pulled after allowing a pair of hits leading off the fifth. He was charged with three runs on six hits with two walks and a hit batter.

“The stuff was really good, I think,” Skenes said. “Just got to get ahead of hitters a little bit, more consistently. But, I think that’ll come.”