His daughter, Harper, remains at a hospital in Boston with esophageal atresia, a condition in which the esophagus isn't joined to the stomach correctly. Robinson has already spent two trips on the family emergency list earlier in the season, but did not need to return after rosters expanded in September.
"The situation with his daughter required his attention," Molitor said. "When you have a daughter less than a year old. and is facing the things she's had to medically this year, there are times when I've encouraged him to go, to be there for her, as well as his wife. This was a time he needed to go."
In his first year with the Twins, Robinson has been used sparingly with the return of Aaron Hicks. He is batting .254 with 16 RBIs in 79 games this season.
• Molitor noted that coach Jake Mauer of Class A Cedar Rapids would join the Twins' coaching staff once he has completed the season on Thursday. Mauer -- the older brother of first baseman Joe -- is in his third year at the helm.
He'll join Ivan Arteaga, pitching coach for Class A Advanced Fort Myers. Both will be used in a variety of roles, as the Twins make a push for the American League's second Wild Card spot.
"I like those guys that work hard for us and get a chance to be up here and experience September baseball in the Major Leagues," said Molitor.
Greg Garno is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.