The one-game benching of Pablo Sandoval for violating the club's social media policy created the opportunity for Shaw to be in the lineup.
Primarily a first baseman coming through the farm system, Shaw has expanded his versatility by playing more third base this year.
"He's a guy that's got good athleticism, has good hands, has played a little over 50 percent of the games at third base while in Pawtucket, and he's handled it pretty routinely from all the reports that I have," said Red Sox manager John Farrell.
Shaw his hitting .259 with five homers and 26 RBIs for Pawtucket this season.
Ian Browne is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.