BALTIMORE — Jefferson High School graduate Chris Beck made his major league debut Thursday, pitching six innings as his Chicago White Sox lost to Baltimore 6-3 in the second game of a doubleheader. Beck, Chicago's second-round pick in the 2012 draft, gave up four earned runs, 10 hits and four walks in six innings. He was called up from Triple-A Charlotte before the game as the 26th player in the doubleheader.