Rodriguez (knee) experienced some minor cramping in his calf during his throwing session Monday, ESPN Boston reports.
Rodriguez was able to finish his session, so this may not be a big deal. What is a big deal, however, is that there's still swelling in the knee and Rodriguez has not yet progressed to throwing off a mound. Manager John Farrell estimates the left-hander has a 10-day window to progress to the point of making his first spring start if he's going to be ready for Opening Day.