The Rockies fear Anderson's back injury could be season-ending, the Denver Post reports. An MRI was order on Anderson's ailing back, with the team wanting to see if there's a possible disc issue, but the results have not been released. Anderson was said to still be in a great deal of discomfort Friday, a day after hitting the 15-day DL. The lefty does not have a history of back issues, but it sounds like the Rockies are prepared to move on without him.