The 28-year-old took to social media on Wednesday to share a heartfelt message for 49ers fans after his injury-plagued campaign. In his post, McCaffrey detailed some of his emotions about the injury before vowing to come back better when he's healed up.

RB Christian McCaffrey, playing in just his fourth game since returning from Achilles tendinitis, suffered a PCL injury Sunday night in Buffalo that coach Kyle Shanahan described as potentially season-ending.