Triple-A's first hold
Ko Woo-suk pitched as a relief pitcher for Jacksonville Jumbo Shrimp (Miami Marlins) in the first ⅓ of the game against the Minor League Triple-A Omaha Storm Chasers (under Kansas City Royals) at Werner Park in Papillion, Nebraska on the 9th (Korea Standard Time). Ko moved from San Diego to Miami on the 5th through a 4-1 trade (Ko Woo-suk, Dylan Head, Jacob Masi, Nathan Matorella ↔ Louis Arraez). Ko, who changed his uniform before his big league debut dream came true, played at Triple-A level for the first time this season. Ko Woo-seok, who took the mound in the bottom of the sixth inning with Jacksonville leading 4-2, handled Logan Porter with a fly ball to center field in just one pitch. Taking the mound in the bottom of the seventh inning, Ko started with an unfavorable ball count of 2-0 by throwing one or two consecutive balls, but he induced a foul with a cutter of three and four pitches, and struck out swinging with a fastball of 92.4 miles per hour (148.7 kilometers) in the fifth pitch. Against the next batter Nate Eaton, he easily got the second out count by inducing a grounder to the third base with a cutter at the ball count 1-0. Ko Woo-suk, who threw three consecutive balls against Tyler Gentry, caught a strike with a fastball and induced a fly ball to the right field with a cutter at the ball count 3-1, ending the inning with three outs. Jacksonville allowed a 4-4 tie by giving up two points in the bottom of the eighth inning after Ko Woo-suk went down, but won 6-5 after overtime. Throwing 13 pitches (seven strikes), Ko took more than half the weight of his cutter (seven pitches), and was accompanied by fastballs (four pitches) and curves (two pitches). His best speed was 93.2 miles per hour (about 150 kilometers) and 92.3 miles per hour (about 148.5 kilometers) on average. Before the transfer, Ko Woo-seok, who had a record of 2 losses, 2 holds, 1 save, and a 3.95 ERA in 11 Double-A games, continued his streak of five consecutive minor league games with good pitching in his first game of Triple-A.