Boston Red Sox right-hander Keith Foulke will not pitch again this season, ESPN's Peter Gammons has confirmed. The struggling reliever returned to Boston on Thursday for an examination on his left knee, another setback for the World Series champions as they scramble to stay in the playoff race. A day after falling out of first place in the AL East for the first time since July 18, the Red Sox sent Foulke home from the road trip to see team physician Thomas Gill. Foulke was a star of Boston's championship run last year, nailing down all four victories in the Series sweep of the St. Louis Cardinals. But he's struggled most of this season, posting a 5-5 record and a 5.91 ERA while saving just 15 of 19 opportunities.