Kentaro Kuwahara

He struggled with control issues before joining the Tigers, but through the guidance of farm pitching coach Yasuo Kubo, they slowly altered his pitching mechanics during the 2016 season. The training made a drastic improvement in his pitching consistency, and resulted to his breakthrough performance in 2017 and his league topping K/BB ratio in 2018.

He got 10 appearances in 2011, but recorded no wins and a 3.50 ERA. He spent the next year pitching in the Western League (farm), where he finished with a 5-1 record and 2.61 ERA out of 22 games. He got a handful of appearances with the main squad in the next two seasons, but he spent the majority in the farm. After making just 22 appearances in 4 years for Orix, he was traded to the Hanshin Tigers at the end of the 2014 season for pitcher Hirokazu Shiranita as Orix was short of starters and Hanshin was short of relievers. He inherited Shiranita's former jersey number, 64.

His now stable pitching got him through 8 pre-season games with a 1.17 ERA, and earned him a spot in the season opener. Afterwards, he and Marcos Mateo worked together as the main set-up relievers to closer Rafael Dolis during matches where the Tigers have a narrow lead. On the April 5 match against the Swallows, he finally earned his first win as a Tiger, 7 years after he last got one in 2010 from the same opponent. From then onward, he appeared in 16 consecutive games until May 21, and from May 27 until July 18 (including 10 Inter-league games), he pitched in relief for 19 consecutive games without giving away a single run. He finished the season as Hanshin's top reliever with 67 game appearances, 1.51 ERA, 39 holds, 4 wins and 2 losses.

He suffered from an injury during the pre-season games in 2009, and only managed to get back to the main squad in mid-August where he pitched mostly as a reliever thereafter. This role continued in 2010, but his appearances gradually decreased as he fell into a slump. As a result, he and Shingo Nonaka got traded to the Orix Buffaloes for Ikki Shimamura by the end of the 2010 season.

He debuted as a reliever against the Carps on April 6, 2008. He then alternated as a starter and reliever in his following appearances, and earned his first win on July 9 when he pitched 2 scoreless innings in relief against the Swallows. On August 16, he threw 150 pitches to claim a complete shutout victory against the Tigers in Kyocera Dome. The rest of his outings were not so good however, and he finished the season with 3 wins, 6 losses, 1 hold and a 4.74 ERA. He performed better as a reliever with 2.45 ERA in 20 games, than as a starter with 6.75 ERA in 10 games.

He entered Nara Sangyo University and pitched regularly in the Kinki University Baseball League. In the spring of 2007, he pitched a perfect game against Nara University, earned 6 wins and helped his team win the league championship for the 3rd consecutive tournament. In all his 47 league appearances, he finished with a 26-2 win-loss record, 1.38 ERA and 255 strikeouts, and won one MVP, one Best Pitcher Award, a Fighting Spirit Award (Kantoushou 敢闘賞) and got selected into the Best Nine 3 times.

He got selected as the Baystars' 3rd pick during the 2007 NPB professional baseball draft. He inked a 70 million yen contract for a 12 million yen annual salary, and got assigned the jersey number 38.

Kentaro Kuwahara (桑原 謙太朗, born October 29, 1985 in Nabari, Mie) is a Japanese professional baseball pitcher for the Hanshin Tigers in Japan's Nippon Professional Baseball. He previously played for the Yokohama BayStars from 2008 to 2010 and the Orix Buffaloes from 2011 to 2014.