St. John’s is hitting the transfer market hard again, and it believes it pulled off a coup Tuesday evening, landing one of the top available guards. The Johnnies picked up a verbal commitment from Quinnipiac transfer Mikey Dixon, the MAAC Rookie of the Year, two days after he visited the Queens school. The 6-foot-2 Dixon, a New Castle, Del., native, averaged a team-high 16.5 points per game, along with 3.7 rebounds and 2.3 assists, and picked the Red Storm over Penn State and UMass. Last offseason, St. John’s nabbed transfers Justin Simon (Arizona) and Marvin Clark Jr. (Michigan State), two players it expects to be major contributors next season. Dixon has to sit out next year, as per NCAA transfer rules, but then would join what could possibly be an electric backcourt featuring Simon and All-Big East rookie-team selections Shamorie Ponds and Marcus LoVett Jr. “I wanted to challenge myself and play at the highest level I could,” Dixon told The Post in a phone interview. “I’m ready to push myself, push my limits and get better. There’s nowhere better to play than in the Big East.” Dixon only was recruited by mid-major schools out of Sanford High School in Delaware and excelled as a freshman at Quinnipiac. Before coach Tom Moore was fired, the idea of looking elsewhere was already in consideration, so when Moore was terminated, it made the decision easier.