D.C. United has allowed one goal over their last three games, and defender Daniel Woolard's play on the back line has been a key reason. (AP Photo/The Salt Lake Tribune, Djamila Grossman)

Photo by: Djamila Grossman

D.C. United has allowed one goal over their last three games, and defender Daniel Woolard's play on the back line has been a key reason. (AP Photo/The Salt Lake Tribune, Djamila Grossman)