Chicago Cubs slugger Kyle Schwarber was not medically cleared to play the outfield and will be limited to pinch hitting duty for Games 3-5 of the World Series, club president Theo Epstein said Thursday.

"Of course we're all disappointed," Epstein said. "We'd love to see him get 4-plus at-bats.

"Just too much risk."

Schwarber surprised the Cubs by returning in just six months from a major knee injury to start at designated hitter in the first two games of the World Series. But Epstein said team doctors stressed that playing the field presents too much risk for Schwarber's surgically repaired knee.

Schwarber's hitting .429 with a double, two singles and two RBI in the World Series.

The series is tied 1-1 and returns to Wrigley Field, which will host its first World Series game since 1945.