Middlesbrough are closing in on signing number seven of the summer. Michael Carrick has so far signed five first-team players for Boro in the current transfer window. Luke Ayling arrived on a free transfer from Leeds United before being joined by Delano Burgzorg and Aidan Morris. Middlesbrough then added Harley Hunt to their academy ranks before taking a brief break in the market. After assessing his squad in pre-season, Carrick has, so far, opted to make two more new additions to his team. Micah Hamilton joined Middlesbrough from Manchester City ahead of their meeting with Swansea City for £3…