Against the Harrisburg Senators, led by prospect Carter Kieboom, Mitch Keller tossed eight scoreless innings, surrendering one hit and two walks while striking out six batters. As is usual for the Pirates top prospect, he pounded the zone throwing 58 of his 92 pitches for strikes (63 percent).
Keller lowered his ERA to 2.72, for reference his ERA in all of 2017 was 3.03. The one concern is the 22.22 percent walk rate he has on the season and 9.36 percent walk rate. Last year those numbers were 25.0 and 6.9 percent. He’s still projects to have 70 command according to Fangraphs, am encouraging sign.