Stephen Kolek pitched nine innings without allowing an earned run in the Kansas City Royals' 5-0 victory over the Seattle Mariners. He posted the highest score in The Game Network Performance Index across 14 games on May 23.
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The complete game shutout at Kauffman Stadium marked Kolek's third win of the season. The Royals scored five runs to support his effort, securing the victory against Seattle.
Kolek struck out two batters while completing all nine innings. The performance stood out among the day's pitching efforts, as he allowed zero earned runs throughout the contest.
The outing improved Kolek's season record to 3-0 across four appearances. He has pitched 26.0 innings this season with a 2.77 ERA, 14 strikeouts, and a 0.85 WHIP.