Kōyō Aoyagi

Kōyō played ball for the Terao Dolphins as a fifth-grader in primary school, and went on to pitch for Namamugi Junior High. He became the ace pitcher of Kawasaki Kikoka High School in Kanagawa, but his team never made it to any national tournaments.[2]

He entered Teikyo University where he was a regular starter in the Tokyo Metropolitan Area University Baseball League. Despite having undergone right elbow surgery in his third year, he pitched spectacularly the following year where he led the league in wins (6), and was awarded Best Nine.[3] After four years and 37 game appearances, he finished 15–9 with a 1.91 ERA.

He was the Tiger's 5th round pick during the 2015 professional draft.[1] He signed a 40 million yen contract with Hanshin, for an estimated annual salary of 7.2 million yen.[4] He was assigned jersey number 50.

2016

While he joined the main squad during spring camp and got a shot at pitching during one pre-season game against the Marines, he struggled with control as he walked the first 3 batters he faced, and ended up giving up 2 runs in 2 innings of relief.[5][6][7]

He debuted as a starter in the June 1 away game against the Eagles, as a last minute replacement for the scheduled starter Yuya Yokoyama who suddenly experienced shoulder pain at the time.[8] Despite walking 4 and hitting 1 batter, he completed 5 innings and only allowed a sole run, thus grabbing the win.[9][10] He became the first right-handed Hanshin pitcher to win his first official start since Minoru Murayama on 1959, and the third rookie pitcher in NPB history to win his first start during Inter-league play.[11]

His next start was on July 7 in Tokyo Dome, where he shut down the Giants by pitching 7 perfect innings while allowing only a single hit.[12] After this, he became a regular in the Tiger's pitching rotation. But despite a strong start, he lost momentum during mid-season, and he finished the season with only 4 wins out of 13 games with a 3.29 ERA. While his win-loss percentage might be unimpressive, he only surrendered a single home run out of 289 at bats.

During the post-season break, he pitched for Samurai Japan (national team) in the Asia Winter League tournament in Taiwan. He notched 2 wins and 1 save in 4 games (1.69 ERA), and was awarded the league's best pitcher, also won by fellow Hanshin pitcher Yuta Iwasada in the previous year.[13]

2017

His good performance during spring training and pre-season exhibition games earned him a spot in the roster at the start of the season. His first start on April 8 was rained out after 3 innings, and got cancelled.[14] As he struggled with control in his next two starts and committed errors that lead to runs, he lost both games and got sent back to the farm at the end of April.[15] He got called back to the main squad a few weeks after, and notched his first win against the Baystars on May 28 (6 innings, 8 hits, 2 runs).[16] He finished the season with a 4–4 record out of 12 games, and an improved ERA of 3.22. Despite giving away more hits, he gave away fewer walks, and allowed only 2 home runs over 66 innings.

2018

Aoyagi was not in top form in 2018 and spent most of the season pitching in the Western League farm games. Nevertheless, he recorded 6 consecutive farm wins by June, and continued to pitch well after. He was eventually called back to the main squad, and was assigned to start the September 2 match against the Baystars where he recorded his first win of the season. He had 3 more starts after that, but failed to record a win in any of those. He finished with a main squad record of 1-1, 3.32 ERA, and a Western League record of 8-2 and 2.73 ERA.[17] He also won the Western League award for highest number of wins. However, his subpar performance in the main squad earned him a 1 million yen pay cut.[18]

2019

He began as part of the main squad starting rotation, and appeared regularly throughout the season. He lost his first two starts and did not win until April 23 against the Baystars. He earned his first career shutout win six days later against the Dragons in Nagoya Dome.[19] His succeeding outings were a hit-or-miss, and he finished the season with 9-9 with an improved ERA of 3.14. Despite not throwing any wild pitches and walking relatively few batters, he had the worst first pitch hit rate amongs all NPB starters (48% from 30 hits out of 62 first-pitch swing attempts). He said that the temptation to swing at his first pitch can sometimes work to his advantage as he sometimes ends an inning with just 3 pitches thrown. Most of his outs were ground balls and he topped the league in ground-ball percentage with 64% and ground outs with 40.9％. He also got the most double plays turned amongst all NPB hurlers with 28.[20] This earned him an 18 million pay raise, bringing his annual salary to 30 million yen.[21]

A sidewinder and sometimes submarine pitcher,[2] Aoyagi throws a two-seam fastball in the 130–145 km/h (81–90 mph) range as his main pitch, alternating with a slider and a four-seam in the high 130s (maxed at 148 km/h (92 mph)[7]), with the occasional changeup.[24] During the 2019 autumn camp, retired legendary Dragons pitcher Masahiro Yamamoto taught him how to throw a sinker which proved to be effective against right-handed batters and had the highest fanning rates (9.7%) amongst his pitches but lowest punch out rate (8%).[21]

His reputation as a ground ball pitcher was cemented in 2019 when he topped the league in ground-ball percentage.[20]

When he started in 2016, he performed very poorly against base stealing attempts as he allowed 13 out of 16 attempts to succeed. Afterwards, the coaches worked on his reaction time and pickoff throwing skills.[25] His fielding skills also leave much to be desired and is a work in progress as he has trouble making accurate throws during assists.[26]

He was clocked at 6.8 seconds at the 50 meter dash.[27]

Aoyagi started throwing from a three-quarters delivery when he started pitching in grade school. At first, the team manager tried to fix his mechanics, but eventually decided to encourage him to keep throwing from the side.[28] Despite this, his pitching form was made fun of by other kids so he tried to switch to overhead pitching once more in junior high. His arm started hurting shortly after doing this so he returned to throwing from the side.[29]

Aoyagi is also an avid manga fan. When he first joined the Tigers, he moved into their dormitory with about 300 volumes of the Weekly Shōnen Magazine. When he played in the 2016 Winter League, he kept posting sad tweets of not being able to read the magazine in Taiwan. Kodansha, the manga's publisher, read about Aoyagi's tweets, and promised him that they will reserve copies of the magazine that he wasn't able to read while overseas. The company sent 3 weeks worth of the magazine to the Tiger's camp when Aoyagi returned to Japan.[30] Kodansha is thinking about naming him their manga publicity ambassador.[31]

• NPB Statistics

• Career statistics and player information from Baseball-Reference (Minors)