After a back-and-forth affair that saw the Nashville Predators claw back a lead, then give it up in a regulation loss, they head south to take on the Pittsburgh Penguins on their way home. It’s been a rough year in the Steel City, with the losses significantly outnumbering the wins. The Penguins put Evgeni Malkin on IR last week, with injuries — stop me if you’ve heard this one before — once…