text: Roxbury group to buy S. Boston building The Mayo Group of Roxbury is expected to purchase 51 Sleeper St. in South Boston, a vacant eight-story building owned by Frank H. McCourt Jr. McCourt, who owns the Los Angeles Dodgers baseball team, defaulted on a \$22.5 million loan on the property this year. A group of investors sold the loan to Mayo Group for about \$17 million, and ...