What happened: Owen Wolff made his debut for Sporting KC, entering for Stephen in the 70th minute. The midfielder joined the club via an August transfer from Austin FC.

Why it matters: Wolff had been recovering from an ankle injury that sidelined him for his final three matches in Austin. He entered the match as Sporting KC surrendered a 3-0 halftime lead, ultimately losing 4-3 to the Philadelphia Union.

What to watch: Wolff will look to build match fitness as he integrates into the midfield rotation.