Vikings running back Adrian Peterson said Saturday evening that he has been battling tightness in his left hamstring since the second practice of training camp but the running back expects to be back at full speed on Monday. The Vikings have their first off day of camp on Sunday, giving Peterson an additional day to rest. Peterson was held out of four practices this week before returning on Friday morning. However, Peterson remained limited on Friday and while he did work in 7-on-7 and 11-on-11 on Saturday morning, he did not take part in any of the "live" periods as the Vikings wore full pads. Source: Star-Tribune
