By Andrew Gastelum The American forward has scored four goals in eight games for first-place Union Berlin since arriving this summer from Young Boys. In a week where he was omitted from the upcoming U.S. men’s national team camp, Jordan Pefok scored once again in the Bundesliga for first-place Union Berlin. Plenty of USMNT fans were left puzzled by Pefok’s omission earlier this week given his hot start to the Bundesliga season, and the 26-year-old’s performance on Sunday may only add to the questions. In the 54th minute of a 2-0 win against Wolfsburg, the D.C.-born forward made a darting, near…