Ryan Reynolds has put his snark to good use as Deadpool; it’s a little frustrating that he’s using the same mannerisms for everything from Detective Pikachu to Fast and Furious, because he can play straight just as well. Similarly, Ben Mendelsohn is a terrific actor who has been typecast as a baddie in Ready Player One, Rogue One and Robin Hood; both of them need to be a bit more creatively cast. Writers and director Anna Boden and Ryan Fleck provide proof of concept that both men have the chops to do great work with Mississippi Grind, a downbeat but hugely impressive character study of who men under the narcotic grip of gambling. Gerry (Mendelsohn) is a poker player who imagines that hanging out with the younger, better-looking Curtis (Reynolds) might change his luck; he’s right in a way, but not the way he imagines. Both men are weak; a key dialogue scene hinges on their willingness to place a bet on something as random as the appearance of the next person to walk into a room. Robert Altman’s California Split was an inspiration, but Mississippi Grind has an energy and a loucheness all of its own; if you’ve only seen these actors paying the rent in blockbusters, it’s something of a revelation to see what they can do in a small-scale drama like this.