Despite being a relief pitcher, he has accumulated a team-leading 7 wins, racking up victories at a rapid pace.

Chiba Lotte Marines 's pitcher Akira Yagi has recorded a team-leading 7 wins as of the end of June. If he can add 3 or more wins for the remainder of the season and achieve double-digit win, it will be the first time a relief pitcher in Pacific League has achieved this feat in 16 years, since Ryo Sakakibara in 2010.

This article introduces pitcher Yagi's characteristics and strengths as pitcher, based on the various statistics and metrics he has achieved on the professional stage so far. We will examine the changes that this right-hander, who is making great strides in his fifth year as a professional, is showing this season, and look forward to his continued success in the future. (*Statistics are as of the end of the game on June 25th)

In addition to his excellent control, he also had two seasons in which he recorded strike out rate above a certain level.

The following are the various metrics that pitcher Yagi has recorded year by year.

In his rookie year in 2022, he posted a respectable 3.63 ERA in 22 games, but in 2023 he posted an 18.00 ERA in 3 games, and in 2024 he posted a 4.09 ERA in 9 games, failing to produce the desired results and resulting in fewer appearances. In 2025 he appeared in a career-high 27 games, but his 5.96 ERA showed a lack of consistency in some of his appearances. However, this season he has shown even better pitching than in his rookie year, posting a 1.50 ERA, and has already appeared in 21 games as of June.

In terms of metrics, one of his greatest strengths is BB rate. Excluding 2023, when he only pitched three inning, BB rate for the four seasons he has pitched has been below 3.00, and for the last three seasons it has been below 2.00, maintaining an excellent BB rate of 2.64. In particular, in 2024 he gave up only one Walk in 11 inning, recording an outstanding BB rate of 0.82.

In addition, although his career strike out rate of 7.34 is not particularly high, he recorded excellent numbers in two seasons: 8.46 in 2022 and 8.77 in 2025. As a result, his K/BB ratio was 9.00 in 2024 and 3.57 in 2025, both exceeding the excellent level of 3.50, demonstrating the ideal trend of strike out strike out few BB.

He gets results by pitch to get the batters to hit the ball.

On the other hand, his career Avg was .268 and his BABIP against was .310, both tough numbers, and he often suffered heavy hits in the first team. Additionally, in 2022, he posted a Avg.291 batting average and allowed a BABIP of .344; in 2025, he had Avg.302 and a BABIP of .367, showing that in seasons where he appeared in more than 20 games, he allowed hit more frequently.

The general benchmark for BABIP is .300, but basically, pitcher has few factors over their own control and is considered a highly susceptible indicator to luck. While there are cases where BABIP being affected by pitcher performance may worsen, in the long run, it tends to converge to values close to the baseline, which is another characteristic of this indicator.

Furthermore, pitcher Yagi's Avg for 2026 is .176, and his BABIP against is .200, both significantly lower than in the past four seasons. These numbers indicate that pitcher Yagi has suffered fewer blows and can also be seen as a reversal of the unlucky aspects of his career.

Also, the 2026 strike out rate is 5.40, well below his career average, which is another interesting factor. With improvements in Avg and BABIP received, Yagi pitcher 's strength of using his high control to compete with hitter in the strike zone has become fully utilized, indicating a shift this season toward a pitch style that allows players to hit.

For example, in the game against Tohoku Rakuten Eagles on April 29, with one out and runners on first and second in a tie situation, he reached mound and retired on the first pitch with a infield grounder double play to achieve a brilliant one-pitch win. Also, in the game against Tohoku Rakuten Eagles on June 21, he pitched in a critical situation with two outs and bases loaded despite the score tied, and in the next hitter, he grounded out a infield ground ball to put out the fire. In this game, he also earned the win with just two pitches.

His ability to make opponents hit in pinch, and his WHIP of 0.90, with little chance of increasing runner, shows why pitcher Yagi is heavily relied upon in situations where he has runner. Also, as evidenced by the fact that he has played 30 inning in 21 games this season, he is also known for his full-spin performance, which is a hallmark of his ability to play full rotation without hesitation about spanning the ball.

It's natural to think that pitcher Yagi's traits produce strong pitching in long relief or when pitching in games tied or tied, which tend to lead to wins. This could also be seen as a phenomenon where he is a reliever and racks up many wins.

There have also been cases where relief pitchers have achieved the highest winning percentage or the best ERA.

Sakakibara (Hokkaido Nippon-Ham), who most recently posted double-digit win as a reliever in 2010, pitched 72 inning in 39 games that year, demonstrating outstanding toughness with a ERA of 2.63. Despite reliever with a 10-1 record and 6 hold, he posted double-digit win and was also named Rookie of the Year that year.

In 1999, Takayuki Shinohara (Fukuoka Daiei) pitched in 60 games, posting an outstanding ERA 1.25 ERA and posting an astonishing 14-1 record. He achieved an impressive .933 winning percentage by meeting the win number required for the highest winning percentage and achieving the remarkable feat of winning the highest winning percentage title as a reliever.

Looking further back, Motoyuki Akahori (Kintetsu) reached the required innings pitched in 1992, pitching 130 inning in 50 games while mainly serving as a reliever. He posted an outstanding record of 11 wins, 4 losses, 22 saves, and a ERA of 1.80, achieving double-digit win and winning Best ERA and Best Relief pitcher. He performed the remarkable feat of winning both the starting and relief titles in the same season.

Can they continue to seize the momentum in tense situations and achieve double-digit win?

In 2013, Dennis Sarfate (Saitama Seibu Lions) recorded 9 wins, and in 2021, pitcher Chihaya Sasaki (Chiba Lotte Marines) and in 2023, pitcher Shota Watanabe (Tohoku Rakuten Eagles) both recorded 8 wins. While there have been relief pitcher who have come close to double-digit win in recent years, with the increasing prevalence of pitcher specialization, there have been no examples of relief pitchers achieving double-digit win in Pacific League for quite some time.

Can pitcher Yagi continue to deliver game-changing pitch in the second half of the season and achieve the remarkable feat of recording double-digit win as a relief pitcher? It will be worth paying close attention to the future pitch of this right-hander, who has consistently nipped potential threats in the bud with his ability to induce ground balls and fly pitch, and to the final number of wins he accumulates.