One of the biggest gripes over Jurgen Klinsmann's finalized 23-man Copa America Centenario roster was the lack of a natural left back. That concern has now been alleviated as U.S. Soccer announced on Friday that they have replaced Timmy Chandler on their roster with Edgar Castillo.

Chandler picked up a quad strain in Eintracht Frankfurt's relegation playoff second leg against Nurnberg. It's an unfortunate turn of events for the German-American who was set to re-enter the national team picture after a year's absence.

In steps Castillo, who many thought would be the team's left back heading into this tournament. He will join the team after the Liga MX Finals concludes.

His inclusion adds a new wrinkle into lineup possibilities. Castillo being an option now allows Klinsmann to have some flexibility with where he starts Fabian Johnson in the lineup. Without a natural left back, Johnson seemed destined to occupy the left back position. Now with another option available, he can play whichever one the manager prefers him at.