press release

Unocal names A.J. 'Tony' Best to head Pure Resources subsidiary

El Segundo, Calif., Dec 17, 2002 -- Unocal Corporation (NYSE:UCL) today said that industry veteran A. J. "Tony" Best, 53, has been named president and chief executive officer of its Pure Resources, Inc., subsidiary.

This position was created after Unocal successfully acquired of all of Pure Resources' outstanding common stock in November. Best, who has a bachelor of science degree in mechanical engineering from Texas A&M University, has spent the last 23 years in the energy industry. Prior to his present consulting practice, he served as president of ARCO Latin America, based in Caracas, Venezuela. During his career with ARCO, he held several other key positions within the company, including president of ARCO Permian, vice president of External Affairs for ARCO Alaska and Prudhoe Bay field manager.

"We are extremely pleased to have been able to attract someone as accomplished as Tony into this job," said Timothy H. Ling, Unocal president and chief operating officer. "He brings outstanding commercial and people leadership skills as well as important local business insights and relationships from his years running Arco's Permian business in Midland."

Ling went on to say, "Building sustainable North American businesses is crucial to Unocal's strategy, and the combination of the excellent assets we have in Pure, plus Tony's experience and leadership, give us a great platform to build on in the onshore US."

Best's responsibilities will include all of Unocal's Permian and San Juan producing assets as well as some onshore assets currently managed under Unocal's Gulf Region USA business unit. In addition, Best will oversee the management of Pure's 6 million gross fee mineral acres position.

Updated: December 2002