SAN JOSE -- The Earthquakes' Chris Wondolowski finally found the magic touch again Thursday night.

Major League Soccer's leading scorer stole a ball in front of the net and got the game winner in second-half stoppage time as San Jose defeated San Luis FC 1-0 in an exhibition match in front of an announced crowd of 4,234 at Buck Shaw Stadium.

Wondolowski has 18 goals in MLS but had not scored in the field play for seven consecutive games. He got shut out much of the game by the Mexican Primera Division club from San Luis Postosi in the heart of Mexico.

But Wondolowski took advantage of a broken play in the 92nd minute and beat goalkeeper Cesar Lozano with a low shot on the right side of the net.

"I feel good that we won," the De La Salle High-Concord graduate said. "If the goal had made it 4-0 it wouldn't mean as much."

But whether it signaled the end of Wondolowski's scoring slump he could not say.

"We'll find out in nine days if I am over the hump or I am still behind the hump or if I am under the hump," he said. "As long as we keep winning I am a happy guy."

The Earthquakes (16-6-5) return to MLS action Sept. 15 at Chivas USA.

San Jose won for the third consecutive time at Buck Shaw, where it is unbeaten this season.

But it appeared the Quakes were headed for a scoreless draw until Wondolowski's last-minute heroics. San Jose showed little energy and imagination on offense while its defense kept San Luis at bay.

The friendly was interesting if only to watch English defender Jordan Stewart audition for the Earthquakes. The former English Premier League left back is trying out over the next week for a chance to sign in 2013.

Stewart, 30, is out of contract after last playing at Millwall FC in England's Football Championship League, a step below EPL. Stewart had played for English clubs since 2001 except for a brief stint in Greece.

He looked serious about impressing coach Frank Yallop on the left side of the field. Stewart helped save a goal in the 53rd minute when goalkeeper David Bingham got caught off his line. The English defender headed away a shot on the goal line.

"What you get from an older pro player is they know the game," Yallop said. "He knows what he is doing."

Stewart paid his own way to San Jose for a chance to make an impression.

"I always wanted to play in MLS," he said.

Stewart said he will return to England after his 10-day trial and hope to get signed for next season.

San Jose got a scare in the second half when Turkish striker Sercan Guvenisik had to leave with a left hamstring injury after playing only 19 minutes.

Contact Elliott Almond at 408-920-5865 and follow him on Twitter at http://twitter.com/elliottalmond.