Retired Chicago Cubs pitcher Kerry Wood and his wife, Sarah, on Wednesday sold their six-bedroom, 11,250-square-foot Georgian Revival-style mansion in Winnetka for its $8.5 million asking price — making it that suburb’s highest-priced sale of the year. A hard-throwing right-handed pitcher, Wood, 47, famously struck out a record 20 players in a shutout game as a rookie in 1998.