William Wyman Sherwood is an American multi-instrumentalist, songwriter, singer, record producer and mixing engineer. He is best known for his tenures in the English progressive rock band Yes as guitarist and keyboardist in 1994 and from 1997 to 2000 and as bassist since 2015, following the death of original bassist Chris Squire. He is also known for working with former and current Yes members on other projects.

Guy Allison is an American musician. He was the touring keyboardist for the Doobie Brothers from 1996 to 2015 and was featured on their 2000 release Sibling Rivalry.