William Oliver O'Dell (February 10, 1933 – September 12, 2018) was an American professional baseball player. He pitched in the Major Leagues in thirteen seasons: 1954 and from 1956–1967. He was signed by the Baltimore Orioles in 1954. He also played for the San Francisco Giants, Milwaukee / Atlanta Braves and Pittsburgh Pirates.
O'Dell was born in Whitmire, South Carolina. He studied at Clemson University. O'Dell died at a hospital in Newberry, South Carolina on September 12, 2018 from complications of Parkinson's disease, aged 85.