Big Brother Mark Jansen -- 5 things to know about the 'Big Brother' houseguest 06/29/2017 Mark Jansen is competing as one of the houseguests on Big Brother's nineteenth season. Read More RELATED NEWS 'Big Brother' couple Jessica Graf and Cody Nickson welcome fourth baby together'Big Brother' couple Jessica Graf and Cody Nickson expecting fourth child together'Big Brother' couple Jessica Graf and Cody Nickson welcome another baby girl together TAGS: Big Brother Mark Jansen
