A sequel titled Ace of Diamond Act II was serialized from August 2015 to October 2022, with its chapters collected in 34 tankōbon volumes.

The series follows Eijun Sawamura, a baseball pitcher with an unusual pitching style that naturally causes the ball to move unpredictably at the plate.

Some time later, Sawamura and his teammates, Furuya Satoru, Kominato Haruichi and Miyuki Kazuya, lead a new team, along with a few returning faces, through the fall tournament.

Ace of Diamond Act II continues to follow Sawamura and the team as they prepare to compete for the summer tournament.

Simultaneously, the Seido batters are improving themselves to become as fearsome as the batting talent of their previous year's first-string team.

Written and illustrated by Yuji Terajima, Ace of Diamond was serialized in Kodansha's Weekly Shōnen Magazine from 17 May 2006[a] to 14 January 2015.

[5][6] A sequel manga, titled Ace of Diamond Act II was serialized in the same magazine from 19 August 2015[7] to 26 October 2022.

[14][15] Another spin-off manga, titled Cat of Diamond, by Terajima's wife Yuki Okada, was serialized on Magazine Pocket app and website from 12 January to 30 November 2022.

[22] The TV series was produced by Madhouse and Production I.G and began airing on 6 October 2013 on TX Network stations and later on AT-X.

[39] Nikkei Entertainment magazine published a list of top 50 manga creators by sales since January 2010, in its September 2011 issue; Yuji Terajima, the author of Ace of Diamond was ranked 20th, with 2,792,000 copies sold.