The Chicago White Sox series against the Chicago Cubs took an ugly twist on Friday afternoon. After Paul Konerko blasted a home run off Cubs starter Jeff Samardzija, Samardzija threw a slider that got away and drilled Konerko in the face.

Konerko fell to the ground in obvious pain and appeared to have a cut and swelling around his left eye. Konerko left the field holding a towel to his eye and was sent to undergo further tests, according to a tweet by CSNChicago.com's David Kaplan:

Although Konerko hit a home run in his first at-bat of the afternoon, this did not appear to be an intentional act by Samardzija. It was a slider that slipped out of his hand and happened to collide with Konerko in a very bad location.

Samardzija walked toward the plate after Konerko went to the ground, showing obvious concern for Konerko's well-being.

It might not have been intentional, but the White Sox felt the need to respond by throwing at the Cubs' Bryan LaHair later on. Both teams were warned, setting up a very interesting weekend in Chicago.