The Red Sox have been waiting to get their infield back to full strength, as they found themselves with all three of their second base candidates in Dustin Pedroia, Brock Holt and Eduardo Núñez on the injured list. The good news was, in their absence, Michael Chavis has emerged as a consistent threat in the lineup. Tzu-Wei Lin had been solid in his chances as well, but then Friday happened. In what was otherwise an entirely positive game, the utility man went into second base a little funny on a stolen base attempt, hurting something in his knee.