I don't know much about him, and I haven't read any of his books, but was reminded of his existence when I was perusing the website of Oxford University Press. Apparently he does not believe in the unity of the virtues; when he speaks of God wand His foundational place in morality, does he subscribe to a form of Pelagianism? Or is he sneaking theology in under the guise of philosophy?
His wife is Marilyn McCord Adams. (Who is apparently a liberal Episcopalian.)
Marilyn and Bob Adams join Chapel Hill Philosophy Department
Faculty page and CV (MMA's page)
Gifford Lecture Series - Biography - Robert Adams
Photo at wiki.
From OUP:
A Theory of Virtue (a review)
Finite and Infinite Goods: A Framework for Ethics (GB)
Also from Google Books:
The virtue of faith and other essays in philosophical theology