Yoshirō Hamada (浜田 良郎)

A childhood friend of Mihashi who also lived in Creaky Creaky Villa, Hamada failed to move up and so is required to repeat his first year. Though he used to play baseball with Mihashi when they were young, Hamada has quit playing for an unknown reason, supposedly because of an elbow injury. He says that he has a “little league elbow” which refers to an elbow injury caused by pitching too much when he was younger. Hamada founded the baseball team's cheering squad (ouendan), and is very good at sewing. Mihashi calls him by his childhood nickname, Hama-chan, which has been adopted by other members of the baseball team. He attended the same elementary school and junior high as Izumi, and the two appear to be very familiar with each other.

Detail Info
Class: Year 1 Class 9
Family: Parents, younger brother
D.O.B:December 19
Blood type: B
Height: 183cm
Weight: 70kg
Voiced by: Atsushi Kisaichi

Tsuyoshi Shiga (志賀 剛司)

The teacher advisor responsible for the baseball team. Though he is a math teacher, Shiga-sensei appears to have a great deal of knowledge about the body and how it works, although he doesn't know much about baseball.

Detail Info
D.O.B: November 26
Family: Wife, son, daughter
Position: Teacher Advisor
Blood type: A
Height: 180cm
Weight: 79kg
Voiced by: Takehiro Murozono

Maria Momoe (百枝 まりあ)

Momoe-san is the supervisor of the baseball team. She was part of the softball generation at Nishiura. She loves everything about baseball, to the point that she willingly spends all of the money she saved from her part time jobs on the baseball team. In high school, she was the manager of the softball team, and took part in all of their practices. As a result of this, she is a highly skilled player, and very good at coaching her team both in practices and when sending signs during games. The team have nicknamed her Momokan (short for Momoe-kantoku- coach Momoe in Japanese) and are very fond of her, although they often find her scary, too. She has a dog, Ai-chan, who is thought to be a mixture of a corgi and a Shiba Inu. She drives a motorcycle and works in physically demanding jobs such as cleaning the windows of skyscrapers.

Detail Info
Age: 23
Family: Grandmother, parents, younger brother
Position: Coach
Throws/Bats: Left/Left
D.O.B: April 18
Blood type: O
Height: 163cm
Voiced by: Risa Hayamizu

Chiyo Shino'oka (篠岡 千代)

She is the manager of the baseball team. Very hardworking and earnest, she has great pride in the baseball team, and does her best to help out the team in anyway possible, from making rice balls to writing detailed reports about opposing teams. As manager, she has lots of information about her own team, and knows all of their full names and birthdays. However, she has said herself (in chapter 17) that she has no romantic interest in anyone on the team. She went to the same middle school as Abe and Sakaeguchi, where she played softball in the position of shortstop. Chiyo also loves trying on other school's uniforms, and often swaps uniforms with her friends and takes pictures.

Detail Info
Class: Year 1 Class 7
Family: Grandmother, parents, younger sister
Position: Manager
Throws/Bats: Right/Right
D.O.B: March 25
Blood type: AB
Height: 154cm
Weight: 42kg
Voiced by: Misato Fukuen

Kazutoshi Oki (沖 一利)

Along with Hanai, Oki is Nishiura's reserve pitcher. He has more pitching experience than Hanai, but was reluctant to admit it as he doesn't really want to pitch in official games. However, he is inspired by Mihashi's dedication and decides to try his best. Oki is the only left handed player on the team.

Detail Info
Class: Year 1 Class 3
Family: Parents, older sister
Position: First baseman, pitcher and outfielder
Throws/Bats: Left/Left
Uniform number: 3
D.O.B: July 20
Blood type: A
Height: 172cm
Weight: 60kg
Voiced by: Takehiro Satō

Shōji Suyama (巣山 尚治)

Suyama appears to be quite level-headed, for example calming Sakaeguchi down before an at-bat during the match against Tosei. He is generally quieter and less rambunctious than his teammates, although he reacted strongly to a particular brand of protein powder being supplied as a prize by Momokan, having tried it before and declaring it to be so horrible he would never eat it again.

Detail Info
Class: Year 1 Class 1
Family: Parents, older brother, younger brother
Position: Short stop and third baseman
Throws/Bats: Right/Right
Uniform number: 6
D.O.B: April 6
Blood type: A
Height: 175cm
Weight: 64kg
Voiced by: Makoto Yasumura

Kōsuke Izumi (泉 孝介)

Izumi is one of the more experianced players on the team, good at batting and catching and most notably a very fast base runner. He is in the same class as Mihashi and Tajima and shares their lunchtime activities of talking, eating and then falling asleep. He attended the same elementary and junior highschool as Hamada, although up until high school Hamada was a year above him. He appears to enjoy antagonising Hamada and does not treat him with the respect due to a former senpai.

Detail Info
Class: Year 1 Class 9
Family: Father, Mother and an older brother
Position: Center fielder and third baseman.
Throws/Bats: Right/Switch hitter
Uniform number: 8
D.O.B: November 29
Blood type: O
Height: 168cm
Weight: 55kg
Voiced by: Jun Fukuyama