Manager Bud Black said there likely won't be another update on Maybin until early September.
"Here in the short term -- short term meaning two weeks -- no baseball activities," Black said. "He's going to remain inside, get his treatment, stay off the knee, let it quiet down, and then we'll see where we are in a couple weeks."
After averaging 142 games for the Padres in 2011 and '12, Maybin has played in just 14 this season. He incurred a wrist injury in mid-April that kept him out until June, when he played just four games before injuring the knee. In 51 at-bats this season, Maybin is hitting .157.
AJ Cassavell is a reporter for MLB.com. Follow him on Twitter @ajcassavell. This story was not subject to the approval of Major League Baseball or its clubs.