Richard Grieco , known for his role as Dennis Booker on the original 21 Jump Street TV series , appear for the first time as Steve Batando , Mindy O 'Dell 's ex @-@ husband . In 2012 , the New York Daily News called Grieco 's role on Veronica Mars " his last mainstream role " . Ryan Pinkston guest stars as Danny Rossow , a pizza shop employee . He would go on to make a guest appearance on series creator Rob Thomas 's later show Party Down . Robert Ri 'chard appear as Mason , Wallace 's friend .