The Red Sox are starting to become concerned about the defense of catcher Jarrod Saltalamacchia, writes Gordon Edes of ESPN.com. "The season is just 16 games old, and there are ominous signs that a worst-case scenario is developing for the 25-year-old catcher, whose throwing problems are growing increasingly impossible to ignore," Edes wrote. The Sox have caught 6-of-20 base-runners attempting to steal with Saltalamacchia behind the plate, a respectable 30 percent caught-stealing rate. Of those six, three were pickoffs by the pitcher and only three have been thrown out by the catcher, meaning Saltalamacchia has thrown out just 17.6 percent of the runners who have attempted to steal (3-of-17).