You are going to Watch Ace of Diamond Episode 51 English subbed online free episodes with HQ / high quality. Stream Anime Ace of Diamond Episode 51 Online English sub The Battle Begins! Seidou battles Inashiro for the right to go to Nationals. Mei overthinks his opening battle with Kuromichi and walks him. Kuromichi steals second base standing up, a sacrifice bunt from Kominato moves him to third, and a base hit from Isashiki gives Seido a 1-0 lead. Seeing nothing to lose, Mei decides to battle Yuuki one-on-one as the rest of Seidou watches wondering if Mei is losing it. This episode covers chapter 148, the first half of 149, all of 150, and the first half of 151.