When Bartolo Colon throws a wild pitch, something is definitely off. A wild pitch and allowing a home run on the same night? Most unusual. On the same day Colon was named the American League Pitcher of the Month for June, he absorbed his first loss since May 9 when the Cubs downed the A's 3-1 at the Coliseum. Chicago's win was boosted by Colon's two mistakes and Matt Garza's standout pitching. "Bartolo did well, the way he always does," catcher John Jaso said. "We just didn't score any runs to back up his performance." Garza, who is likely to be traded this month, allowed four hits in eight innings. Though Colon's winning streak ended at eight, Oakland remained atop the AL West, a half game ahead of the Rangers. Colon's wild pitch came in the first inning, with two outs, and it sent Starlin Castro to second base. Colon immediately paid for it when Alfonso Soriano blooped a single to center to send in Castro. Colon's last wild pitch had come May 26, 2009, at Anaheim; he'd gone 443 innings without one, which had been the longest active streak in the majors. Jaso blamed himself for missing the slider. "It hit the thumb of my glove and bounced up," he said, adding that when the run scored, "no one felt worse about it than me. I had to come up to the clubhouse and get away from everyone, I was so mad at myself." Over his previous eight starts, Colon (11-3) had given up one home run. On Wednesday, Josh Reddick very nearly prevented another, leaping high at the wall in right in the third inning for a drive by Luis Valbuena. The ball was just an inch or two too far away for Reddick to grab it. Colon cruised from there, and with runners at the corners and two outs in the seventh, manager Bob Melvin went to the mound for a chat. Colon told him he wanted to face the next hitter, Nate Schierholtz, then got Schierholtz to fly out to left.