The Iveys changed their name to Badfinger with the single release of "Come And Get It," a song written by Paul McCartney, which became a worldwide Top Ten hit. Ham's hard work paid off eventually as his song "No Matter What" became another worldwide Top Ten hit record in late 1970 . He followed up writing two more huge hits released in 1972, "Day After Day" and "Baby Blue" But the peak came with his co-written song "Without You" - a worldwide No. 1 hit as covered by Harry Nilsson in 1972. The song has since become one of the all-time ballad standards as covered by hundreds of singers including Mariah Carey and Clay Aiken. Ham was also used as a musician on Beatles solo records such as the "All Things Must Pass" LP by George Harrison and the single "It Don't Come Easy" by Ringo Starr.