According to PWInsider.com, WWE has released Mason Ryan, Raquel Diaz, Danny Burch and Oliver Grey.
Mason Ryan was part of the WWE main roster from 2011-2012, notably part of CM Punk's New Nexus stable. Ryan had been showcased on NXT TV throughout the last year.
Raquel Diaz, whose real name is Shaul Guerrero, was showcased on the FCW TV program prior to WWE switching over to Full Sail University from 2011-2012, notably winning the FCW Women's Title and being part of the original incarnation of the Ascension. Diaz had taken leave late last year for a medical issue, but had returned to NXT late last year, although she was never shown on the WWE NXT TV program in her second run. Diaz is the daughter of Vickie and the late Eddie Guerrero.
Oliver Grey had just returned from a major knee injury that kept him out of action for over 8 months. Grey had been featured prior to his injury as one-half of the British Ambition tag-team with current NXT Champion Adrian Neville, notably winning the tournament to crown the first-ever NXT Tag Team Champions in early 2013.
Danny Burch was signed in 2011, but was mostly used as an enhancement talent on the WWE NXT TV program.