Vikings quarterback Tarvaris Jackson suffered an MCL sprain in his left knee during today's practice, according to a person with knowledge of the situation. This comes almost a year after Jackson sustained a sprained MCL in his right knee in a preseason game at Baltimore. ProFootballTalk cites a source in its report and says that "initial word is that it's only a Grade I sprain, and that Jackson might be day-to-day." Source: Star Tribune
