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Don Ryan, Associated Press
Portland Timbers fans yell during the first half of their MLS soccer game against Sporting Kansas City in Portland, Ore., Saturday, April 21, 2012.

PORTLAND, Ore. — An own goal spoiled Sporting Kansas City's quest for an eighth straight victory.

Chance Myers' headed the ball into his own goal in the 41st minute against the Timbers for a 1-0 Portland upset on Saturday night at Jeld-Wen Field.

Sporting KC opened the season with seven straight wins and was Major League Soccer's only undefeated team heading into the match against the struggling Timbers. The record for most victories to start a season is 12, set by the Los Angeles Galaxy in 1996, the league's inaugural year.

The victory snapped a four-game losing streak for Portland, who hadn't won since a 3-1 victory at home over Philadelphia in the season opener.