Phoenix ? The University of Arizona has reported a possible NCAA recruiting violation by men’s basketball coach Lute Olson, who called it “an unfortunate and regrettable error.”

Athletic director Jim Livengood said Monday that Olson had sent a letter to basketball boosters asking for a donation to Jim Storey’s Arizona Cactus Classic basketball tournament, held last May at Arizona’s McKale Center.

NCAA rules prohibit institutional representatives or boosters from arranging financial assistance for potential recruits.