Glenn Kaiser (born January 21, 1953) is a Chicago-based Christian blues musician, singer-songwriter, and pastor. He was the leader of Resurrection Band and Glenn Kaiser Band.

Kaiser joined and got involved in The USA Traveling Team of Jesus People Milwaukee (later renamed Jesus People USA), where he met Wendi, his future wife. Wendi's brother, John Herrin, Jr., and Glenn later became members of the pastoral team before the age of twenty-five[2]. JPUSA is the community that organizes the Cornerstone Festival, at which Glenn Kaiser and Resurrection Band have regularly played.

Mansfield got his start in 1974 with a band called Jubal. When the band arrived at a Maranatha! Music meeting, they discovered that another band had a similar name. So, to avoid confusion or conflict, both bands decided to take on new names. Mansfield's band took the name, the Gentle Faith, which had been the name of band member Henry Cutrona's earlier group. The other band renamed themselves Daniel Amos.

Gentle Faith released their first self titled album in 1976 on Maranatha! music. Three years later, Mansfield formed the Darrell Mansfield Band which went on to release five albums: High Power; Get Ready; Darrell Mansfield Band : Live; Vision and Revelation.

Over the years that followed, Mansfield continued to record and tour heavily and has continued to be on the forefront of blues music in the Christian music industry. He has released many critically acclaimed albums including a couple of projects with the Resurrection Band's Glenn Kaiser.

Aside from releasing his own albums, Mansfield has also contributed harmonica to many other artist's recordings as well, including albums by Van Halen, Bon Jovi, Adam Again, and Loverboy.

In 1980, Mansfield was inducted in Hohner Harmonicas Hall of Fame and is regarded today as one of the worlds finest harmonica players. His live performances are a must to see, and hear, for blues and harmonica fans worldwide.