D.C. United goalkeeper Nick Rimando spent much of the team's stay in Charleston in a walking cast with torn ligaments in his left foot. He injured the foot in training shortly after the team returned from Spain.
"It will be another week or two, and then I'll see what happens," he said of the injury.
Rimando does not expect to play in the season opener.
D.C.'s Jaime Moreno topped all scorers with three goals, one in each game of the tournament. Two of the three were penalty kicks.
Charleston's Ben Hollingsworth finished second in goals behind Moreno with two goals, one against New York and one against D.C.
In the previous two years the tournament has been played, the winners, Houston (then San Jose) in 2005 and Columbus in 2004 went on to win the MLS Supporters' Shield.
D.C. United is the only MLS club to play in the Carolina Challenge Cup all three years the tournament has existed, but has never won it.
New York and Houston did a little horse-trading between matches this week. Houston midfielder Danny O'Rourke and New York midfielder Adrian Serioux were swapped on Friday. O'Rourke and Serioux both started for their new clubs Saturday and played the entire game, with O'Rourke playing in the Red Bulls central midfield and Serioux playing in the back line for Houston.
Houston's Brad Davis did not play in any of the team's three games, but coach Dominic Kinnear expects him to be ready for action, at least as a substitute, when the team hosts the Colorado Rapids on April 2.
Charleston's 1-0 win over New York on Wednesday was the first win the host side has ever had in its tournament. Last year, the Battery suffered losses to Columbus and San Jose and tied D.C. In 2004, Charleston lost to D.C. and Columbus and drew with Wilmington.
A large contingent of D.C. United fans made the eight and-a-half hour drive to Charleston for the final game of the Carolina Challenge Cup including members of the Barra Brava and Screaming Eagles. New York Red Bulls fans also made the preseason tournament part of their spring vacation.
Andrew Mosier is a contributor to MLSnet.com. This story was not subject to the approval of Major League Soccer or its clubs.