 Poco Pine was a 1954 bay stallion, sired by Poco Bueno, and out of Pretty Rosalie, a daughter of Pretty Boy. As a foal, he was bought at E. Paul Waggoner's 1954 Waggoner Ranch sale by Paul Curtner. Curtner had originally intended to purchase a daughter of Blackburn and a filly by Poco Bueno, but instead ended up purchasing two different horses – a mare by Pretty Boy (Pretty Rosalie) and a colt by Poco Bueno (Poco Pine). While still at the sale, Curtner was approached by two employees of Waggoner's, both informing Curtner that in their opinion, he 'd bought the best mare in the sale. One of the employees, Pine Johnson, Waggoner's trainer, also felt that the colt was the best Poco Bueno colt he 'd ever seen. Because of Johnson's praise for the colt, Curtner decided to register the foal as Poco Pine.
