Coleman went down after a shoestring tackle in the second quarter with the Niners driving for a third score. Coleman appeared to have an opening, but was tripped up by Packers safety Adrian Amos and extended his arm to steady himself as he was going to the ground. Coleman's arm appeared to bend at an awkward angle, and he went down in obvious pain.
While San Francisco was able to score a touchdown on the next play, the injury could be significant for Coleman. It's not clear yet if he suffered a break at any point in his arm, but it appears very unlikely he would return for the NFC Championship game and could be in danger of missing the Super Bowl if the team advances.
David Chao, the former team doctor for the Los Angeles Chargers, who now analyzes football injuries, wrote on Twitter that it appeared Coleman may have suffered a hyper-extended elbow.