BALTIMORE — Coco Crisp hit a tie-breaking home run leading off the ninth inning and Jarrod Parker earned his eighth straight win as the Oakland Athletics beat the Baltimore Orioles 2-1 Saturday.

After Parker and Chris Tillman waged a magnificent pitching duel for eight innings, Crisp connected on a 3-1 pitch from Darren O'Day (5-3). It was the third home run in three games for Crisp, who had four hits on Friday night.

Parker (10-6) gave up one run, five hits and three walks to improve to 8-0 in 16 starts since May 22. A right-hander, Parker threw 117 pitches and worked out of jams in the sixth and eighth innings.

Grant Balfour got three straight outs for his 32nd save.