BALTIMORE (AP) - Chris Davis hit his major league-leading 20th homer to ignite a three-run seventh inning, and the Baltimore Orioles got a strong pitching performance from rookie Kevin Gausman in a 4-2 comeback victory over the Detroit Tigers on Sunday. Nate McLouth drove in the go-ahead run for the Orioles, who took two of three from Detroit. Baltimore also rallied on Friday after trailing by two runs in the ninth. Prince Fielder homered and scored both runs for the Tigers, who have lost five of six. Rick Porcello (2-3) absorbed his first loss in seven starts since April 20. Brian Matusz (2-0) got the win despite giving up a run in the seventh, Darren O'Day worked the eighth and Jim Johnson got three outs for his 18th save.