Polster is expected to stay out of the upcoming matchups versus D.C. United and Columbus Crew, respectively, after manager Marko Mitrovic mentioned he'll be "out for sure for a couple of weeks. Hamstrings are always tricky. He did an MRI, but it's one of those most sensitive injuries where you have to be sure that they're coming back after the injury ready to go, because the last thing we want with Matt is to have a setback. So, the next couple of weeks he will be out, and then after that we will evaluate everything.",
Caleb Pongratz of Prost Soccer reports.