Way back in the past, Cyrus Gold was a wealthy merchant that had a relatively safe life in Gotham City. However, a group of criminals would kill him and dump him in Slaughter Swamp. Many years later, his body would be imbued with its vegetation, thus being resurrected as the monster Solomon Grundy. His name being a reference to the nursery rhyme, he would become a constant enemy with the first Green Lantern, Batman, and members of the Justice Society of America.

Since Solomon Grundy could not be killed in the Injustice universe, Superman had him undergo the same brainwashing procedure all Regime recruits must endure. He's now the faithful servant of the Man of Steel.

For this character's voice, please refer to Fred Tatasciore's performance of the character in the Injustice game.