[MLS] Brian Ching, who overcame injury problems, to put himself back in contention for a berth on the U.S. World Cup team, left the Houston Dynamo's game against Real Salt Lake in Thursday night with a hamstring strain. It remains to be seen how serious the injury and whether it might jeopardize his chances of making the U.S. World Cup team.

Ching left the game in the 30th minute after suffering the injury on a sprint toward the RSL goal. He clutched his his left hamstring and was helped off the field.

UPDATE: Dynamo spokesman Lester Gretsch told the Associated Press Friday that Ching will be out at minimum of a few weeks but the projected length of the layoff won't be known until early next week. Team doctors re-evaluated Ching on Friday, but no MRI was taken because of the Good Friday holiday.

“I felt a pretty strong pull in the left hamstring,” Ching said in a statement to the Houston Chronicle. “Now it’s going to be a number of weeks before I’m back on the field again. But I’m going to do everything in my power to get back on the field as soon as possible.”

The Dynamo was trailing, 1-0, when Ching left the game. It went on to win, 2-1, on a pair of Brad Davis penalty kicks.