Answer: It's Former 21 Jump Street Star Richard Grieco!
If you didn't recognize the face, maybe you recognized the abs? Yes, it's former 21 Jump Street and Booker star, Richard Grieco! The 47-year-old actor guest starred on Veronica Mars back in 2007 and reportedly tried to replace Charlie Sheen in Two and a Half Men last year, but has mostly stayed out of the spotlight. He's currently working as an abstract artist and produced Showtime's racy docu-soap Gigolos.
P.S. Stop staring at Dustin Ngyuen's jeans!