"He's in a boot," Collins said. "They want him to do as little as possible for a while -- let that mending start."
The centerpiece of the trade that sent knuckleballer R.A. Dickey to the Blue Jays in December, d'Arnaud was batting .250 with one home run and a .429 on-base percentage in his first 49 plate appearances for Las Vegas.
Anthony DiComo is a reporter for MLB.com. Follow him on Twitter @AnthonyDicomo. This story was not subject to the approval of Major League Baseball or its clubs.