Terricka had posted several photos during the pregnancy on her instagram account.
Cromartie, 33, has now had three children since having a vasectomy. The 11-year NFL veteran had the procedure in 2013, according to the New York Post.
"I got snipped," Cromartie told Nicholas Dawidoff for the book: Collision Low Crossers: A Year Inside the Turbulent World of NFL Football, according to the Post.
The rate of pregnancy is about 1-1,000 after the first year following a vasectomy and between 2-10/1,000 after five years, according to the American Pregnancy Association. Couples have less than a 1 percent shot of getting pregnant after a vasectomy, according to reports from the American Pregnancy Association.
The couple confirmed the delivery to US Weekly. Jhett Paxton was delivered on August 30. She weighed 8-pounds and 2-ounces.
Antonio and Terricka were married in 2008. They are also starring in a new reality show called The Cromarties, according to US Weekly. The show premiers on Nov. 9 on USA.
Terricka Cromartie wrote about her pregnancy in May on social media. The couple now has four girls and two boys together. The New York Post reported last year that Cromartie pays $336,000 annually in child support.
Cromartie was a four-time Pro Bowl pick and a 2007 first-team All-Pro selection. He played in four games last season with the Indianapolis Colts. He was released in October.