As was said, Poplatnik went through a brief spell of looking useful as a target man last season. He then got injured and Robinson went on a ridiculous run and Poplatnik could get nowhere near the team. A lack of reserve football definitely hurt him.
He started to play more towards the end of the season and I wasn't a fan. Not convinced he's a good finisher, he's pretty slow and only ok in the air. Maybe McGlynn can see something Martindale can't and find a role in the team that will suit him.