By Andrew Gastelum The Manchester City backup is reportedly closing in on a move to the English second division in a World Cup year. View the original article to see embedded media. U.S. men’s national team goalkeeper Zack Steffen is expected to join Championship side Middlesbrough on loan from Manchester City for the upcoming season, according to the Manchester Evening News. In the past two seasons, Steffen has won two Premier League medals, but only made two Premier League appearances for Man City while sitting behind starting keeper Ederson. Across all competitions during that time, the 27-…