Brian Serven hit his first major league home run in almost four years and rookie Gage Jump pitched six scoreless innings as the Athletics cooled off the Boston Red Sox with a 4-3 victory Tuesday night. Henry Bolte had an early RBI single, and pinch-hitter Lawrence Butler provided a critical insurance run with an RBI double in the eighth. Connor Wong launched a two-run homer with two outs in the ninth for the Red Sox, who had won 18 of 20. Luis Medina was charged with a run in 1 2/3 innings and Hogan Harris got four outs for his ninth save. Up nextAthletics LHP Jacob Lopez (5-4, 5.12 ERA) starts Wednesday night against Red Sox LHP Patrick Sandoval (0-0, 3.21).