COMMERCE CITY, Colo. — Sluggish in the first half, the Americans needed some kind of catalyst.

So the team called on Jerome Kiesewetter and Jordan Morris, ending their nights off.

Kiesewetter sparked the offense with a goal and an assist in the second half, and the United States beat Panama 4-0 in CONCACAF Olympic qualifying on a rainy Tuesday.

Already through to the semifinal round, the Americans didn’t have much to play for and rested several of their starters. Scoreless at halftime, coach Andreas Herzog turned to his bench for a lift, sending in Kiesewetter and Morris.

The U.S. caught a break early in the second half when Panama defender Fidel Escobar knocked in a crossing shot. Kiesewetter then scored about three minutes later and Morris right after that.