Foster worked as an album producer on albums for The Tubes: 1981's "The Completion Backward Principle" and 1983's "Outside Inside". Foster cowrote such songs as "Talk to Ya Later", co-written with Tubes singer Fee Waybill and Steve Lukather from Toto, the Top 40 hit "Don't Want to Wait Anymore," and the number 10 US hit "She's a Beauty". The 1980 Boz Scaggs album "Middle Man" saw Foster cowrite and play keyboard on some of Scaggs's most successful songs, including "Breakdown Dead Ahead", "Jojo", and "Simone", followed by "Look What You've Done to Me" from the film "Urban Cowboy".