150 → 139 km fastball is missing, but he showed 3 scoreless innings class
Sep 07, 2025
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Koo Chang-mo started the game against the KIA Tigers in the '2025 Shinhan SOL Bank KBO League' held at Changwon NC Park on the 7th and recorded 50 pitches, four hits, no four outs, and two strikeouts in three innings.
It was difficult to see a fastball over 150km that Koo Chang-mo threw funny when he was a left-hander ace. He threw 23 fastballs, with a maximum speed of 143km and a minimum speed of 136km. The average speed is 139 kilometers per hour. He mixed 13 sliders (126-134 kilometers per hour), 13 fork balls (126-130 kilometers per hour), and one curve (112 kilometers per hour).
Koo Chang-mo made a non-FA multi-year contract worth a total of 13.2 billion won for up to seven years after the 2022 season, but he raised concerns about a malicious contract as he played only 11 games after the contract. Repeated left arm ulnar injury since 2020 has been the biggest problem.
The key was whether to play the return match safely without getting sick. Koo Chang-mo will return for the first time in 711 days since the match against KIA in Changwon on September 27, 2023. He was replaced after suddenly complaining of an abnormality in his body while throwing two ⅓ innings, and was out for the season when he was diagnosed with a re-fracture of the ulnar bone in his left forearm after a hospital examination. Koo Chang-mo, who was rehabilitating from the injury, joined Sangmu and chose to solve military problems first.
Koo Chang-mo joined the team shortly after he was discharged from Sangmu in June and thought it would be a great help, but it took time because he asked for more build-up processes. The return has been delayed so far due to symptoms of left elbow muscle clumping during the build-up process. Koo Chang-mo set the limit of 50 pitches on the day and prepared to take the mound.
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It was a good start. Koo Chang-mo excited home fans by turning Yoon Do-hyun, Park Chan-ho, and Kim Sun-bin into three outs in the first inning. The fastball speed was formed from the late 130km range to the early 140km range, slower than coach Lee's expectations, but he induced a mistake by using a fork ball as a decision ball.
In the top of the second inning, he gave difficult leadoff hitter Choi Hyung-woo a ground ball to the first base, but he was in crisis by allowing Na Sung-beom to hit two pitches to the right. After throwing three consecutive sliders to Oh Sun-woo and receiving a close foul home run, he stuck with a fastball again and struck out swinging. Kim Seok-hwan also struck out a rookie with a 140km/h fastball at the ball count of 0B2S.
leading 1-0 in the top of the third. KIA batters began to target Koo Chang-mo's ball. Kim Tae-gun, Yoon Do-hyun and Park Chan-ho hit to load the bases with one out. I had a hard time getting both a fastball and a fork ball. a situation in which the number of pitches is imminent. He endured the burden of facing KIA-centered hitters Kim Sun-bin and Choi Hyung-woo. Kim Sun-bin was treated as a shortstop infield flyout, and Choi Hyung-woo continued to throw sliders and turned them into left field flies after a full count match, finishing the pitch scoreless.
Koo Chang-mo, who filled just 50 pitches, finished his duties as he was replaced by Jeon Sa-min ahead of the defense in the top of the fourth inning with a 2-0 lead.
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This article was translated by Naver AI translator.
