[5] Rockenfield cites Judas Priest, Boston and Kiss as his early influences, and later he also became a big fan of Neil Peart and Rush, Van Halen, Iron Maiden, The Police and Pink Floyd; bands that were progressive and, "really pushed the envelope".

[2] Before long, guitarist Chris DeGarmo and bassist Eddie Jackson joined Cross+Fire, and the band name was changed to The Mob.

[11][12] In 2001, Rockenfield collaborated with former Queensrÿche guitarist Kelly Gray and the Brother Cane members Damon Johnson and Roman Glick in a hard rock project named Slave to the System, releasing one eponymous album.

In 2013, Rockenfield played drums on the Headless album Growing Apart, which also includes vocalist Göran Edman and the Italian guitarists Walter Cianciusi and Dario Parente.

"[5] Rockenfield initially started composing music for TV commercials, and later moved on to video and film scores.

[2] In 2010, Rockenfield founded Hollywood Loops, that specializes in sound effects for film, television and video game composing.

[7] That same year, he also composed and recorded drum tracks for the Activision video game Call of Duty: Black Ops.

Rockenfield does a lot of his work, most notably the recording of his orchestral arrangements, in the Klaus Badelt Studios in Santa Monica, California.

Rockenfield uses ddrum drums, Paiste cymbals, Pearl and Gibraltar hardware, Attack drumheads and Easton Ahead drumsticks.