Shaw filled in at third base when Pablo Sandoval was forced to leave Saturday's game with a left-ankle injury. Shaw, primarily a first baseman during his minor-league career, has been getting a significant amount of playing time at third base with Triple-A Pawtucket over the last year-plus. With Sandoval in a day-to-day state, the Red Sox may need a fill-in for a few days. Either Shaw or Brock Holt is capable of that.