The 34-year-old infielder underwent an MRI on Sunday, which revealed the diagnosis. The news is a significant blow for the Angels, as Escobar had been one of the club's most productive hitters, batting .272 with five home runs and 17 RBIs in the leadoff spot.
"Escobar kind of sets the pace at the top of the order," Scioscia said. "We're going to miss Yunel for as long as he's out."
Luis Valbuena started at third Sunday and seems projected to garner most of the playing time there in Escobar's absence. Valbuena has mostly played first base for the Angels this season, but the majority of his Major League appearances have come at third. Cliff Pennington and Jefry Marte are also options at the hot corner, and Scioscia said the division of playing time will likely depend on matchups.
"We'll definitely have enough depth to rotate some guys and get them off their feet," Scioscia said. "But we also need to establish some continuity. We want to try to get guys comfortable at their spots and swinging the bats like they can."
Maria Guardado covers the Angels for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.