Green cancelled his expected official visit with St. John's for this weekend.
"Danny has seen St. John's many times and he knows the coaches well," Charles said. "So he feels he is ready to make a decision."
Green has already officially visited Pittsburgh and has seen North Carolina unofficially. In recent days, Green has indicated a desire to push up his recruiting process with a visit to North Carolina sooner than Midnight Madness weekend.
"The only school really Danny needed to see was Pittsburgh," Charles said. "He had not been to that campus before where he has seen the North Carolina campus. So he's ready to make his decision between the three schools."