Todd Gurley's knee has become more than a matter of concern - it's an enigma.Despite being fantasy's number one overall player for each of the past two seasons, Gurley's stock is sinking quicker than the Titanic. He's reportedly developed arthritis in his surgically-repaired knee. It may or may not have affected his performance and playing time in the playoffs. It may or may not be a major factor in his performance and playing time again next year. Nobody knows because the Rams have kept the det[...]