Lotte Giants joined two rookie pitchers in this year's spring training camp and completed all activities from the first camp in Tainan, Taiwan, to the second camp in Miyazaki, Japan. The first-round elite left-handed pitcher Kim Tae-hyun and the second-round right-handed pitcher Park Se-hyun participated.

The previous day (10th), first-rounder Kim Tae-hyun made his debut in front of the home fans at Sajik. He pitched two innings, allowing one run (unearned). The following day, second-rounder Park Se-hyun made his official debut at Sajik Stadium.

On the 11th, Park Se-hyun took the mound during a practice game against LG Twins at Sajik Stadium, with the game tied 2-2 in the eighth inning and one out on first base, where he pitched two-thirds of an inning, allowing one walk and striking out one without allowing any runs. Following that, a sacrifice fly by Son Ho-young in the bottom of the eighth made Park Se-hyun the winning pitcher in his official debut.

On that day, Park Se-hyun struggled with his control against the first batter, Lee Young-bin, giving up a walk. However, he induced a ground ball to shortstop against Koo Bon-hyuk to catch the lead runner at first base, setting up a crisis with two outs and runners on first and third.

LG sent up Oh Ji-hwan as a pinch hitter for Choi Won-young. Facing a veteran hitter in a critical situation as a rookie pitcher, it was likely to be nerve-wracking despite being a practice game. The first pitch was a 148 km/h fastball that was called a ball. However, after that, he threw a 146 km/h fastball in for a strike and followed with a slider for another strike. With a favorable count of one ball and two strikes, Park Se-hyun faced the challenge head-on. He threw a 146 km/h fastball that caused Oh Ji-hwan to swing and miss. The veteran hitter, who signed a six-year contract worth 12.4 billion won with LG, was turned away with a Samjin for the final out of Park Se-hyun's first official appearance.

After the game, Park Se-hyun reflected, “Since I was brought in with runners on base, I think I focused more on competing against each batter in front of me rather than being nervous.”

He continued, “Looking back at spring training, I especially appreciated the help of senior Kim Won-jung. He gave me a lot of advice while being my catch partner.” He added, “The most memorable advice was to perfect my strengths, the fastball and the slider, and return. Today, I focused on the fastball and slider, just as senior Kim Won-jung advised. Thanks to that, I was able to finish the first real game without giving up any runs.”

Finally, he stated, “I will prepare well during the remaining time so that I can gain more experience in the first team.”

Coach Kim Tae-hyung praised, saying, “In the latter half of the game, in a tied situation, Kim Kang-hyun and Park Se-hyun threw well, and closer Kim Won-jung held it down, allowing us to secure the victory.”

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