Enjiro is a talented baseball player, but has to quit due to a 100 million yen debt. Komado's family runs Benten High School, but the school is on the brink on bankruptcy and (for some strange reason) the only way to save it, is to win the National High School Baseball Tournament (a.k.a the Koshien Tournament).
Seeing Enjiro as their savior, Komado offers to pay him 100 million yen, if he joins the school's baseball team and wins the Koshien Tournament.

Love can be obsessive. Like wanting to rip the wings off a butterfly. Chouko has been in love with Taichiro for a long time. Taichiro and Chouko have known each other since childhood. At one point, Taichiro became very candid and told Chouko that he hated her so much that he wanted to kill her. Even so, Chouko's desire toward him never really changed. One day, a senior in her athletics club confessed to her. Filled with burning jealousy, Taichiro also confessed to Chouko. Their insecure, but very obsessive love begins.

An extra prequel can be found inside of Yoru Koi.

From MangaHelpers:

The very tall Ryudo Kagetora aims to be the best basketball player in Japan! He has chosen a formerly famous basketball high school, in order to bring it to new glory. He also dislikes girls, ever since a girl beat him at basketball in grade school.

There is also another new ace player joining the basketball team, Ichinomiya Chiaki. However, Chiaki was an ace on the middle school women's basketball team. She becomes a man when she's on the basketball court, and she was kicked out of women's basketball team when her quirk is revealed. Ryudo learns her secret, and reluctantly becomes her ally and roommate! [tethysdust]

From Tokyopop: Anya, the new girl at Lucrece High, just isn't fitting in. Her dream is to join one of the school's elite sports teams, but when she tries out, she's instantly rejected! Anya doesn't get mad, though--she gets even. When she meets other "misfits" who've been similarly written off, they form their own soccer team, complete with cool, edgy uniforms. They may not be the most experienced, but they've got something no other team has: style. Say hello to the world's first Gothic-Lolita soccer team!

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Homare doesn't succumb to her father's disappearance and her mother's illness and works hard to inherit the tumbledown inn with hot springs. What will happen to the firm rule of no love!?

Nine is the number of the best striker in soccer. Given the number 9 in the Megumi High soccer team, Fujiyama Kazuya is a striker with a parallel belief that a draw in a game has no meaning. To him, if you don't win, then there's no sense in playing at all. Despite that kind of mentality, their team has never won a game as of yet. How far forward will the boy who has never been victorious--but even so, is determined to win--reach when a mysterious man called Kuniyoshi Utagawa, who has a liking for the number nine, makes his appearance?

Goal Den Age is a manga that was published in serial SPECIAL soccer cartoon.

From ryColaa:

Akiyama first came across seeing Hana in the corner of the television screen when some nameless female kickboxer was being interviewed. Since then, he was smitten and went to all three of her matches, but then all of a sudden, she stopped competing and he became at a loss as to what to do. But then he runs into her by accident on the street on his way home from work and discovers that this woman, who wants to become the world champion, is far more complicated than he could have ever imagined…

Persistent mediocrity hasn't dissuaded Fukutsu Toshi, captain of a lame high school baseball team, from his love of the game. But when the principal, dissatisfied with their winless performances, threatens to take away their playing field, Toshis is forced into action to turn things around with all out efforts. But facing him at every turn is endless adversity. Nothing is ever easy for him, but luckily, Toshi has the determination to beat it all. -Bakaupdates

Chinmi, an orphan who lost his parents in a tidal wave, is a promising sumo wrestler. Even though he did very well in the junior championships, none of the sumo scouts were interested in signing him because of his body, which is unsuitable for sumo wrestling, and also because of his weird sumo style. But luck comes his way when a small sumo school owner shows an interest in him and decides to take Chinmi into his school. There Chinmi begins his training to become a yokozuna...

A collection of short stories the centers on what else but volleyball!

From FairGame:

There is first time at everything, and you don't know anything about it. Not about your partner, not about yourself and even how to advance in love. In a certain port city, energetic high schooler Kana, and firm high schooler Kouki live. Two of them experiencing first time at every thing they do. Author of "Smash!", Saki Kaori presents, Hajimete Datte ba!. A heartful love story has now begun

Yasuoka Shion lost her parents, and her voice, when she was young...in a murder.

She was found amidst a blood-soaked room, and the only hint for the suspect was a Shougi board and one piece: the King. Now, Shion steps into the world of female professional Shougi players. As her popularity and fame slowly rises, so do the questions about her past, particularly the murder case that was never solved.

From JShoujo Scans:
As a door closes, another one opens... Kurobe Taiyou's baseball dream ended unexpectedly and the scars it left within him are deep. A chance encounter introduces him to the world of table tennis. Can ping pong light the fire that used to burn so brightly within him?

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Inspired on the real life baseball player Kōichi Tabuchi, this 4-koma with many gag manga elements follows his exploits alongside his team, his struggles and conquests, with a great dose of sarcasm and ironic humor!

A one-shot on Misaki Taro, one of Tsubasa's partner, taking place after the first chapter of Volume 13 of the Captain Tsubasa Manga.

A laid-back 4-koma manga about a feminine baseball coach and the wacky girl's team he manages as they aim to win the Nationals... maybe.

The inexorable girl who aims to be a champion; Jain! and the innocent boy who loves her, Tae jin! Their challenges on the road to championship and an unfitting summer-like love story. -from Naver Webtoons Please address this work as a Manhwa (Korean word for cartoons)