An MLS roster is a living, growing organism that evolves even after the season commences and often takes new shape in the summer. Slots are commonly left open in case a prized target from halfway around the world becomes available. Depth is a constant pursuit.
And so in the days after D.C. United began the season, six weeks of training-camp bonding and a 1-1 draw in Orlando behind it, a new face appeared in the locker room: Costa Rican defender Joseph Mora.
United’s interest in the 25-year-old left back had spanned months. But with his previous employer, Deportivo Saprissa, preoccupied by an international tournament, D.