Houck is being evaluated for a head injury at a Boston-area hospital after being struck by a line drive in the fifth inning Friday against the Yankees, Pete Abraham of The Boston Globe reports.
Houck never lost consciousness, and he was able to walk off the field under his own power. The right-hander allowed one run on four hits over four innings with a walk and two strikeouts prior to exiting. Houck should be considered day-to-day, but the results of his testing will go a long way toward determining whether he makes his next scheduled start.