xDISCIPLEx A.D.(or xdisciplex a.d.) was a straight edge Christian hardcore band from Erie, PA.

Formerly xdisciplex or disciple, the band had to change its name to avoid legal actions due to a prior established band named Disciple. They released albums with Goodfellow Records, Triple Crown Records and Facedown Records.

After they disbanded, Dan Quiggle, Dave Quiggle, and Adam Salaga started another band called Jesus Wept, while Neil Hartman joined No Innocent Victim. Dave Quiggle also works for Facedown Records.

Members of xDISCIPLEx A.D. also played in the bands Anchor, Dodgin' Bullets and Shockwave.