Capitals Coach Barry Trotz updates on training camp battles, Derek Roy’s status

Derek Roy scored during his preseason debut with the Capitals, but will he make the final cut and earn a contract?. (Photo by Katherine Frey/The Washington Post)After another round of cuts slimmed their ranks of five prospects bound for the minor leagues, the Washington Capitals and Coach Barry Trotz still have more than a week remaining before the deadline for final roster decisions, leaving plenty of time to resolve four positional competitions unfolding at training camp.

But with only three preseason games left after Monday night’s visit to Barclays Center, the new home of the New York Islanders, and several injured NHL skaters — Brooks Orpik, Marcus Johansson and Michael Latta — in need…