The once-muscular Earl Simmons has a pot belly and gray hair in the photo published by The Jasmine Brand.
Some fans say the additional weight could simply come from no longer using cocaine and crack.
Simmons was sentenced in March to a year in federal prison after pleading guilty last year in U.S. District Court in Manhattan to ducking $1.7 million in taxes.
The judge at the time called Simmons "a good man" who deserved less than the five years that federal prosecutors sought but still needed punishment for a "brazen and blatant" crime.
There's no parole in the federal system, meaning the father of 15 will have to serve out just about all of his sentence.
DMX is a Mount Vernon native who grew up in Yonkers. He lived near the Bedford border on McLain Street in Mount Kisco with now-estranged wife Tashera Simmons before putting the home into foreclosure in 2016 after filing for bankruptcy.
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