Complex sentence: Following his debut on the main roster, Langston appeared concurrently on "NXT"; he went on to successfully defend the NXT Championship against the likes of Conor O'Brian, Brad Maddox and Damien Sandow.
Split into simpler sentences: Following his debut on the main roster, Langston appeared concurrently on "NXT". He had three successful title defenses against Conor O'Brian, Brad Maddox and Damien Sandow.