Marathon Oil (MRO)

Clarence P. Cazalot, Jr.

Director since 2000

Age 56

President and Chief Executive Officer, Marathon Oil Corporation

Mr. Cazalot graduated from Louisiana State University in 1972 with a BS degree in geology, and joined Texaco Inc. that same year as a geophysicist. After holding a number of increasingly responsible management positions, Mr. Cazalot was elected a Vice President of Texaco Inc. and President of Texaco’s Latin America/West Africa Division in 1992. In 1994, he was named President of Texaco Exploration and Production Inc. Mr. Cazalot was appointed President of Texaco International Marketing and Manufacturing in 1997, and in 1998 he was named President - International Production and Chairman of London-based Texaco Ltd. He was elected President of Texaco’s worldwide production operations in 1999. Mr. Cazalot joined USX Corporation as Vice Chairman and Marathon Oil Company as President in March 2000. Effective upon the separation of USX’s steel and energy businesses on January 1, 2002, Mr. Cazalot was named President and Chief Executive Officer of Marathon Oil Corporation. Mr. Cazalot serves on the Boards of Directors of Baker Hughes Incorporated, the US-Saudi Arabian Business Council, the American Petroleum Institute and the Greater Houston Partnership. He is a member of The Business Council.

David A. Daberko

Director since 2002

Age 61

Chairman of the Board and Chief Executive Officer, National City Corporation

Mr. Daberko graduated from Denison University with a BA degree and from Case Western Reserve University with an MBA. He joined National City Bank in 1968 as a management trainee and held a number of management positions within the company. In 1985, he led the assimilation of the former BancOhio National Bank into National City Bank, Columbus. In 1987, Mr. Daberko was elected Deputy Chairman of the corporation and President of National City Bank in Cleveland. He served as President and Chief Operating Officer from 1993 until 1995 when he was named Chairman and Chief Executive Officer. Mr. Daberko is a director of OMNOVA Solutions, Inc. He is a trustee of Case Western Reserve University, University Hospitals Health System, Hawken School, and the Greater Cleveland Partnership.

William L. Davis

Director since 2002

Age 63

Retired Chairman, President and Chief Executive Officer, R.R. Donnelley & Sons Company

Mr. Davis graduated from Princeton University in 1965 with a BA degree. From 1977 through 1997 he held a variety of positions with Emerson Electric Company, including the position of President of two of its subsidiaries, Appleton Electric Company and Skil Corporation, and Senior Executive Vice President for the Emerson Tool Group, the Industrial Motors and Drives Group and the Process Control Group. Mr. Davis joined R.R. Donnelley & Sons Company in 1997 as the Chairman and Chief Executive Officer. In 2001, he accepted the responsibility as President of the company. Mr. Davis retired as Chairman, President and Chief Executive Officer of R.R. Donnelley & Sons Company in February 2004. He is a director of Air Products and Chemicals, Inc. Mr. Davis is also Past Chairman of the Board of Evanston Northwestern Healthcare and a former director of Mallinckrodt. Mr. Davis is a trustee of Northwestern University.