"I'm proud I'm a father. I am excited to embark on this new part of my life," the disc jockey told TMZ.
The baby's mother had a fling with DelVecchio in Las Vegas last year, gave birth a few months ago and is now raising the girl in her native New Jersey, the celebrity news website said.
The child's and mother's names were not reported.
Scarlett Johansson steps out with fiance after pregnancy reveal
Senate Democrats to pull all-nighter on climate change