Davis, 25, pedaled on a stationary bike, continuing his rehabilitation from surgery on his left knee in January. As a precaution, the Texans asked Davis to undergo an MRI to survey for new damage, but nothing new appeared in the results. "We took an MRI (Saturday), and it looked good," head coach Gary Kubiak said of Davis' knee. "It is bothering him. It may be a process where he goes two days and then takes a day off and comes back with two more." http://www.houstonprofootball.com/ Well his knee is healthy why is it still inflammed? He had the surgery back in january. I mean hes only 25 how long does it take to get over a knee injury. ACL takes about 8 to 9 months and he didnt tear his.