You probably don't know either of them. Malcolm Merlyn and Damien Darhk. The latter is the one who actually recommended recruiting you. He seemed to be aware that you were part of the Legends.

[Eobard isn't quite sure how that happened, nor did he ask. In the moment Damien thought getting him might be helpful to acquire the Spear of Destiny, and after having all the pieces stolen away he was desperate for any kind of new avenue to pursue.]