Edit: His full name is Seo Jaehyung, and was born in 1990 making him about 21 years old (i'm not sure if his birthday has passed or not this year), and is apparently a flower boy who loves kittens. Other pictures of him include one, two, and three. He originally had a twitter (@jaehyung 90), but deleted it since the boys have started preparing for a debut.
DSPBOYZ is rumored to debut this upcoming May.
DSP+my own research
Another sign of the illuminati in K-POP