For "Head Games", bassist Ed Gagliardi was replaced by Englishman Rick Wills. In his autobiography, "Juke Box Hero" (named after the seminal Foreigner song), Gramm explains why the band parted ways with Gagliardi: "He was a little headstrong and had his own ideas that weren't always compatible with what we were trying to accomplish. Ed was obstinate at times, playing the song the way he wanted to play it rather than the way it was drawn up. Jones often had to stop sessions to get Ed back on track. After a while it became tiresome and slowed down the recording process." Gramm went on to say that he was disappointed overall with "Head Games" and thought it sounded unfinished. It ended up selling about two million fewer than its predecessor.