The Boston Celtics and Washington Wizards haven’t faced off in an NBA playoff series since 1984, but they currently are in a battle of free agency. Yahoo! Sports’ Adrian Wojnarowski reported Saturday, citing league sources, that Boston and Washington “have emerged as the frontrunners to sign free-agent big man Al Horford.” The Celtics reportedly will meet with free agent Kevin Durant in New York on Saturday as they continue their pursuit of a superstar player(s) to partner with All-Star guard Isaiah Thomas and talented head coach Brad Stevens. Horford would give the Celtics a much-needed frontcourt upgrade, which includes consistent scor...