It would be a cameo-sized role for the 42 star. Chadwick Boseman will play Louisiana outside linebacker Vontae Mack in the Ivan Reitman-directed Draft Day, which has set Kevin Costner, Jennifer Garner, Denis Leary, Timothy Simons, and Frank Langella. Boseman is coming off of WB’s baseball hit in which he played Jackie Robinson opposite Harrison Ford. Draft Day is a Summit/Lionsgate and OddLot Entertainment co-production. Rajiv Joseph and Scott Rothman wrote the Black List script. Boseman is repped by Management 360 and Greene and Associates.