NBA Commissioner Adam Silver has had his hands full this offseason: an investigation into tampering claims made against the Los Angeles Clippers and their star forward Kawhi Leonard, multiple star players recovering from devastating injuries heading into the season and, apparently, shopping his Upper West Side apartment. At least he can check the apartment off his list. Silver sold his three-bedroom spread at The Beresford, a co-op building at 211 Central Park West, for $8.5 million in an o...