Nick Swisher will undergo an MRI on his still injured left knee tomorrow. It’s been giving him trouble since he fouled a ball off it in Toronto at the end of August, and it’s clearly not just a minor pain based on how he’s been limping around for the last two weeks or so. Swish had some tests performed not long after he suffered the injury that showed no fractures or structural damage, and apparently he was told he couldn’t make it worst by playing with it. Considering where the Yankees sit with regards to a playoff spot, it only makes sense to get it checked out again and have him rest up before the games really start to count.