Giants’ Chapman Poised for Saturday Return; Mets’ Senga Begins Rehab

San Francisco Giants third baseman Matt Chapman is scheduled to play a one-game rehabilitation assignment for the Triple-A Sacramento River Cats on Friday night, batting second and starting at third base. Manager Bob Melvin said the plan is for Chapman to be activated and appear in the Giants’ lineup on Saturday when the club meets the Oakland Athletics in Sacramento. In a separate injury update, the New York Mets confirmed that right-hander Kodai Senga, sidelined since mid-June with a grade-one strain of his right hamstring, will make a rehab start for the team’s Double-A affiliate on Saturday. The Mets said a successful outing could position Senga to return to the major-league rotation before the All-Star break.