KANSAS CITY, Mo — He was playing the field. Kansas City Chiefs linebacker Jovan Belcher had a boozy dinner with another woman and spent the night at her apartment before he went home, fought with and killed his girlfriend, and then ended his own life in a practice-facility parking lot, sources said yesterday. After dinner and drinks Friday night at a local tavern, the former Long Island high-school star took the woman, Brittni Glass, to her home, but spent the next several hours asleep in his Bentley outside her building, neighbors said. After cops roused him from his drunken slumber...