Walter Martinez scored his first MLS goal and the San Jose Earthquakes made it hold up for a 1-0 win against the Seattle Sounders on Saturday at Santa Clara, Calif.
Martinez, a 31-year-old midfielder who joined San Jose prior to this season, broke open a scoreless match in the 48th minute.
The former Honduran international collected a ball from teammate Steven Lenhart, cut inside Seattle defender DeAndre Yedlin and fired from 12 yards.
Sounders emergency goalkeeper Andrew Weber, who came on at halftime for injured starter Michael Gspurning, could not keep the ball from curling inside the far post.
Weber, a former Earthquake, joined Seattle on loan from Phoenix FC of the USL Professional Division earlier this week after veteran backup Marcus Hahnemann was ruled out with a hamstring injury.
U.S. 4, Cuba 1: Chris Wondolowski scored two more goals to raise his total to five in two matches, and the Americans overcame a slow start to beat Cuba at Sandy, Utah.
Landon Donovan tied the score late in the first half when converted his second penalty kick of the tournament for his 53rd international goal.
Joe Corona got his first international goal early in the second, and Stuart Holden made his first start in nearly three years for the U.S. (2-0), which has reached the quarterfinals of all 12 Gold Cups.
Costa Rica 1, Belize 0: Costa Rica advanced to the quarterfinals on an own goal by Dalton Eiley in the 49th minute.
Costa Rica (2-0) plays the United States (2-0) on Tuesday at East Hartford, Conn., in a match that will determine the Group C winner. Both teams have qualified for the quarterfinals.