Wilmington (4-8), conversely, shot 39.3 percent (22 of 56) from the field, including five straight misses during a 15-0 Miami run over a 2 minute, 23 second span in the second half.
Harris capped the run with a 3-pointer and Johnson added two free throws to give Miami a 69-55 lead with 9:53 left to play.
Wilmington, which led five times, never got any closer as the Quakers missed 14 of their last 18 shots.
Brandon Candella led Wilmington with 16 points.
Kentucky men's basketball coach John Calipari on Thursday apologized to Rick Pitino if the Cardinals coach interpreted his recent comment about scandals on campus as directed toward Louisville.
College basketball coaches across the country will hit the recruiting trail hard in July to target the Class of 2017's top prospects. Which players are the nation's top programs targeting?
Sport Science examines Ben Simmons' max vertical and passing ability, as well as concerns about his jump shot.