So I wasn't expecting this, but Oscar Lindberg had successful surgery on his bilateral hip labral. From the Rangers:
OFFICIAL: #NYR Oscar Lindberg underwent a successful simultaneous bilateral hip labral repair. The expected recovery time is six months.
— New York Rangers (@NYRangers) May 6, 2016
Not sure if this had anything to do with him sitting for a good portion of the back half of the year -- although it should be noted he did play in the playoffs -- but it is interesting.