Baseball is like a complicated version of Rounders. It involves hitting a ball with a stick, then running around several bases placed in the form of a diamond on a field. Big in the US, and also in Japan.
Top 16 Baseball Anime to watch
1. Ballpark de Tsukamaete!

To escape his tiring job, weary Murata finds escape at a nearby baseball stadium. While the games are thrilling, it’s Ruriko, the gyaru as cold as the beer she serves but secretly a sweetheart, who keeps him coming back. As her first regular, Murata discovers the warmth behind her frosty demeanor, and their hilarious, heartwarming encounters light up the ballpark and maybe even their hearts.
Catch Me at the Ballpark! is finished and has 12 Episodes. It is also Known as: ボールパークでつかまえて!, Ballpark de Tsukamaete!
2. One Outs

Toua Tokuchi is an athlete by profession, but a reckless gambler at heart. On the streets of Okinawa, he uses nothing but his wits and a "fastball" peaking at a mere 134 kmph to somehow achieve 499 wins in the game of "One Outs," a simplified version of baseball between the pitcher and one batter. Amazed by Toua's unique prowess on the mound, veteran slugger Kojima Hiromichi artfully scouts the pitcher for his long unsuccessful team, the Saikyou Saitama Lycaons. Kojima desperately hopes Toua will lead them to the championship; however, Tsuneo Saikawa, the mercenary owner of the Lycaons, sees the vastly talented pitcher as a threat to the income generated by the team. Rising to the challenge of swaying the owner, Toua suggests a one-of-a-kind "One Outs" contract: every out Toua pitches will earn him five million yen, but with every run he gives up, he will lose fifty million yen.
Adapted from the manga by Shinobu Kaitani of Liar Game fame, One Outs documents the intense psychological battles between Toua and those around him. With millions of yen at stake, can a pitcher who has done nothing but gamble in a head-to-head imitation of baseball finally lead a real baseball team to victory?
One Outs is finished and has 25 Episodes. It is also Known as: ワンナウツ, ONE OUTS Nobody wins, but I!
3. Major S5

After the baseball season was over, Gorou returned to Japan. There he learned from Toshi that there is going to be a Baseball World Cup the following year hosted in America.
Major S5 is finished and has 25 Episodes. It is also Known as: メジャー, Major 5th Season
4. Diamond no Ace

With a stray pitch that completely missed the batter, Eijun Sawamura loses his final middle school baseball game. Frustrated by this defeat, Eijun and his teammates vow to reach the national tournament once they are in high school. But everything changes when a scout unexpectedly invites him to Tokyo's prestigious Seidou High School after seeing the potential in his unusual pitching style. Encouraged by his teammates, Eijun accepts the offer, ready to improve his skills and play at a much more competitive level of baseball.
However, now surrounded by a large number of skilled players, Eijun struggles to find his place on the team. He declares that he will one day become the team's ace, but that's only if fellow first year Satoru Furuya doesn't take the title first, with his breakneck fastballs that earn him a coveted spot on the starting roster. With the addition of these talented new players to an already powerful lineup, the Seidou baseball team aims to become the best in Japan, facing off against a number of formidable foes that stand in their way.
Ace of Diamond is finished and has 75 Episodes. It is also Known as: ダイヤのA[エース], Daiya no Ace, Ace of the Diamond, Dia no A
5. Boukyaku Battery (TV)

The story of Bouyaku Battery follows Haruka Kiyomine and Kei Kaname, a pair of young baseball players who set the field afire as an unstoppable pitcher / catcher battery in middle school. Although they were scouted by elite sports schools all over Japan, the two instead enroll in an ordinary high school in Tokyo, because Kei is suffering from amnesia and his athletic skills have reverted to the level of a rank amateur.
Oblivion Battery is finished and has 12 Episodes. It is also Known as: 忘却バッテリー (TV), Boukyaku Battery (TV)
6. Tamayomi

In her Junior High years, the pitcher Yomi Takeda was not able to get very far in a cross-school baseball tournament. Since the catcher on her team wasn't at her level, she couldn't use her signature move, the "Magic Throw," and eventually regretted not being able to use it. After Junior High, she decided to stop playing baseball and went to Shin Koshigaya High School, a school without a baseball club.
There, she found her long lost childhood friend, Tamaki Yamazaki, who used to play catchball with her when they were kids. Tamaki also played baseball during her Junior High years as a catcher, and could even catch Yomi's "Magic Throw!"
Their promise with each other during their childhood could now be fulfilled! Walking together on the road of baseball once again...
The story of the girls who love baseball will begin!
TAMAYOMI: The Baseball Girls is finished and has 12 Episodes. It is also Known as: 球詠, Tamayomi
7. Major S3

After leaving Kaido in a promise to meet them at the Koshien tournament, Gorou comes back to his home town once again in an attempt to join up with his old friends. Only this time, things aren't as easy to get back in the groove of.
Major S3 is finished and has 26 Episodes. It is also Known as: メジャー (第3シリーズ), Major 3rd Season, Major 3, m3
8. Major S2

This series picks up a few years after season one. Gorou is now older, and has come back to his original home town. As if nothing changed, he starts off right where he left with his old friends and tries to fit back in. Join him as his embarks on setting out to join up with the elite baseball school, Kaido.
Major S2 is finished and has 26 Episodes. It is also Known as: メジャー (第2シリーズ), Major S2
9. Major S1

Honda Shigeharu is a Major League batter on the rise. His son Gorou is a Little League pitcher who one day hopes to follow in his father's footsteps. Hoshino Momoko is Gorou's school teacher, and the first woman Shigeharu has been interested in since the death of Gorou's mother. The destines of these three individuals will become intertwined as father and son experience both heartbreak and triumph on the baseball diamond. But when an unspeakable tragedy visits the family, it will take everything they have to pick up the pieces and reclaim their dreams.
Major S1 is finished and has 26 Episodes. It is also Known as: メジャー (第1シリーズ), Major S1
10. Major S4

After the final game of his Seishuu team against the goal he set himself, Kaidou—the team he left to play against, Gorou has no feelings of remorse anymore. Again he decides to take a step forward and challenge himself.
Saying one more time good bye to Shimizu and his friends, he leaves for the USA, where he plans on competing in the Minor League.
This is where Season 4 starts, in a country that's foreign to him, a baseball style that's unknown to him and new friends and strong rivals who share the same love to the game as him. Accompany Gorou in his never-ending quest for new challenges.
Major S4 is finished and has 26 Episodes. It is also Known as: メジャー (第4シリーズ), Major 4th Season, Major 4, m4
11. TRIBE NINE

Haru Shirogane is a weak-minded person who is constantly bullied while Taiga has traveled from across the sea in hopes of becoming the strongest man in the world. One night, the two meet up with Shun Kamiya, the strongest XB player, and leader of the Minato Tribe. When they meet, each of the Tribes scattered throughout Neo-Tokyo are about to face a major threat.
On the orders of the King of Neo-Tokyo, "Houtenshin", the Chiyoda Try, led by the mysterious Ojiro Otori, has started to take control of all the tribes in the country. Their evil clutches are about to reach the Minato Tribe...
Tribe Nine is finished and has 12 Episodes. It is also Known as: トライブナイン, TRIBE NINE
12. Major S6

The sixth season begins after the "Baseball World Cup" has ended. Gorou regained his passion for baseball in Japan thanks to his friends, and left to join the Hornets baseball team in preparation to the new season. When he arrives in America he starts to celebrate his role as a Major League pitcher at last! Gorou's family and friends gathers in groups in Japan to watch Gorou's debut in the Major League. However, Gorou's debut is the beginning of a line of surprising happenings, that has an outcome no one expected...
Major S6 is finished and has 25 Episodes. It is also Known as: メジャー 第6シリーズ, Major 6th Season
13. Boku no Hero Academia: HLB

Original animation episodes for the fifth season of Boku no Hero Academia.
Boku no Hero Academia: HLB
HLB stands for “Hero League of Baseball” - it is a baseball league founded by pro-heroes who love baseball!
It’s game day! The last game of HLB championship is between Gang Orca and Shishido's two rival agencies. They form a team to compete. In the world of HLB, there is no rule – using their quirks is of course accepted. However, just when the game is about to finish, they are interrupted by a villain. Who will be the winner of HLB!?
Boku no Hero Academia: Warae! Jigoku no You ni
Deku, Bakugo, and Todoroki participate in internship under the No.1 hero, Endeavor's agency. One of their tasks these days is to find a villain who draws doodles in the city. However, since the urgency is so low, they let other pro-heroes solve this case. One day, Smiley draws a doodle on Endeavor’s house! Being furious, Endeavor himself and the 1-A trio go out to get the villain. However, Smiley’s quirk turns out to be something ridiculous but powerful... It is to make anyone who looks into his eyes laugh hysterically! Can the team capture the villain and stop laughing!?
My Hero Academia: HLB is finished and has 2 Episodes. It is also Known as: 僕のヒーローアカデミア: HLB, Hero League Baseball
14. Extreme Hearts

The story of Extreme Hearts is set in the near future, when the hobby of "Hyper Sports" has become popular among children and adults alike. The story focuses on Hiyori Hayama, a second year high school student who initially has no connection to "Hyper Sports", but after a chance encounter this begins to change as Hiyori and her friends grow closer and pursue their athletic dreams.
Extreme Hearts is finished and has 12 Episodes. It is also Known as: エクストリームハーツ, Extreme Hearts
15. Touch

The story centers around three characters—Uesugi Kazuya, his twin older brother Tatsuya, and Asakura Minami. Kazuya is the darling of his town as he's talented, hardworking, and the ace pitcher for his middle school baseball team. Tatsuya is a hopeless slacker who's been living the life of giving up the spotlight to Kazuya, despite the fact that he may be more gifted than him. Minami is the beautiful childhood girlfriend and for all intents, sister from next door who treats both of them as equals. Society largely assumes Kazuya and Minami will become the perfect couple, including Tatsuya. Yet as time progresses, Tatsuya grows to realize that he's willing to sacrifice anything for the sake of his brother, except at the expense of giving up Minami to Kazuya. And thus the story is told of Tatsuya trying to prove himself over his established younger brother, how it affects the relationship between the three, and both brothers' attempts to make Minami's lifelong dreams come true.
Touch is finished and has 101 Episodes. It is also Known as: タッチ, Touch
16. Cross Game

The main character is Kou Kitamura, son of the owner of Kitamura Sports. In the same neighborhood is a batting center run by the Tsukishima family. Due to their proximity and the relationship between their businesses, the Kitamura and Tsukishima familes have been close for many years, with their children going back and forth between the two homes like extended family. Because Kou and Wakaba were the same age and always together, Aoba was jealous of all the time Kou spent with her older sister. Aoba is a natural pitcher with excellent form, and Kou secretly trains to become as good as she was, even while publicly showing little interest in baseball.
Cross Game is finished and has 50 Episodes. It is also Known as: クロスゲーム, Cross Game