D.C. United waived Rodrigo Brasesco, a Uruguayan defender who hadn’t played in an MLS match since the third week of the season.

Despite lacking backline depth, United made the move in order to open a roster slot and dump Brasesco’s contract, which would have become guaranteed at the end of the month. Brasesco, whose $47,000 salary was one of the lowest on the roster, played on the right side and in the middle. He joined the team in January on loan from Uruguayan club Racing.

With additional roster and salary cap flexibility, the club seems likely to acquire a defender during the summer international signing period, which opens July 15. Club officials have placed central defense as a high priority for reinforcement.

Dejan Jakovic, who plays exclusively in the middle, and Marc Burch, a left back who has played centrally, remain sidelined with hamstring injuries. Devon McTavish is out with post-concussion syndrome. In recent matches, three rookies have started on the backline, mixing quality performances with immature periods. On Saturday, United conceded four goals for the fourth time in the past 11 matches.

Right back Jed Zayner, who has missed all but two games because of two hamstring injuries, might return to the field Saturday at Real Salt Lake. He hasn’t played since the Houston trip April 29.

“It’s been a long 2 1/2 months, an annoying 2 1/2 months,” he said of the season. “I’m ready to go 90 [minutes]. I’m definitely there.”