Haddon is a native of Detroit, Michigan.

Haddon launched his solo career as a Christian R&B vocalist with the Lost & Found on Tyscot/Verity in 2002. The set peaked at #1 on Billboard's Top Gospel Charts and received wide critical acclaim and spawned the hit "Sinner's Prayer" which received heavy spins on gospel and mainstream R&B radio stations.

The 70's-leaning Crossroads followed in 2004, led off by the upbeat single "God Is Good". In an uncharacteristic move for marketing a gospel album, Detrick made an appearance on the long-running syndicated series Soul Train performing the single as well as the title track from the album.

Haddon appears to be reaching his Gospel artistry further into the ranks of mainstream venues with 7 Days, released October 10, 2006. 7 Days was produced almost entirely by R&B stalwart producers Tim & Bob (also responsible for hits by Sisqo, Chante Moore, Karen Clark Sheard, and others). Balancing out the contemporary bulk of the album is the traditional gospel flavored lead single "Heaven Knows" which Deitrick produced himself.

On December 1, 2006, Deitrick and Damita Haddon's 85 South Gospel Street Show premiered on The Word Network. The show features notable gospel artists such as Men of Standard, Donnie McClurkin, Kierra Sheard, Natalie Wilson, and many other prominent gospel artists. In essence, Deitrick and Damita Haddon provide novice artists an opportunity to display their spiritual gifts. 85 South Gospel Street airs every Friday at 4:30 p.m. on The Word Network.

Haddon once inked a recording contract with major label Arista Records, not known for producing gospel artists. Haddon and his brother Gerald also produced the comeback album Brand New Day for veteran gospel vocalist Vanessa Bell Armstrong. Deitrick Haddon & Voices Of Unity's Live The Life won Gospel Music Workshop of America Excellence Awards for "New Artist of the Year—Urban Contemporary" and "Album of the Year—Urban Contemporary".

On September 2, 2008 Haddon released another album called "Revealed". This album has the well known single, "Love Him Like I Do" (featuring Mary Mary and Ruben Studdard) as one of its tracks. On July 27, 2010 Haddon is set to make his film debut in a movie that he stars in called "Blessed and Cursed."

Haddon is a pastor and music director at Detroit's Unity Cathedral of Faith.

Deitrick's wife Damita Haddon is a vocalist and she is great in her own right and released the self-titled Damita on Atlantic Records in 2000, which was also produced in part by Deitrick. She followed it with a sophomore effort, No Looking Back in 2008 on Tyscot Records of Voices of Unity fame.