This article is mainly about deflategate, but check out the rate of fumbles per play at home. Definitely not something we want to be first in. Not sure about the cause, but I have felt for a while we seem to fumble more than most. Of course, don't know the away stats. Or even why, for this article, only home games were reviewed.
http://http://www.vox.com/2015/1/26/7906127/patriots-deflate-fumble-stats
http://http://www.vox.com/2015/1/26/7906127/patriots-deflate-fumble-stats