David Accam is not a good defender. This play illustrates his issues with zonal marking and overall defensive communication. We assume a lack of communication since Meara and Solignac are oblivious to the oncoming disaster behind them. Campbell is screened off while Cocis is defending the near post.
Of note is how de Leeuw puts a body on his man. Instructive as to how David should have handled Marshall.
At this point I am no longer surprised to see such simple breakdowns in the defensive scheme. In particular from one of our weakest defensive players.