Getty As the New York Yankees continue to navigate a midseason slide, the front office is working the phones in search of a third baseman, according to a report. The Yankees have “started to make calls” ahead of the July 31 trade deadline, with Colorado Rockies infielder Ryan McMahon emerging as a potential target, Jon Heyman of the New York Post wrote on July 3. Chisholm Wearing No. 13—But Not Feeling at Home at the Hot Corner Jazz Chisholm Jr. has taken on the bulk of duties at third base in