Los Angeles Clippers owner Donald Sterling, banned from the NBA for racist remarks, has handed controlling interest in his team to his wife, the co-owner, and she is negotiating with the league to sell the club, a source with knowledge of the situation said on Friday. National Basketball Association Commissioner Adam Silver said this week he would prefer to let the Sterlings sell the team "on a reasonable timetable" rather than proceed with trying to forcibly terminate their ownership. Donald Sterling, controlling owner of the Clippers for 33 years, came under fire four weeks ago when TMZ.com posted an audio recording of him berating a female friend for publicly associating with black people, including NBA great Earvin "Magic" Johnson. His comments sparked widespread outrage from fans and NBA players and led several commercial sponsors to sever ties with the team. In response, Silver declared Sterling banned from the NBA for life and called on the 29 other tea