
Over the years, Delfonte Diamond has become a renowned NFL trainer. He has worked with several stars, including Dallas Cowboys wide receiver CeeDee Lamb.
Those days are long gone.
Diamond was arrested and sentenced to 25 years in Texas confinement for aggravated sexual assault of a child, Nick Harris of the Fort Worth Star-Telegram reported on Friday.
This case had to have been going on for some time, so he was previously arrested for this, went through a trial, and eventually got convicted.
What makes matters even crazier is that he is allegedly the nephew of former NBA star Karl Malone.
“Renowned NFL trainer Delfonte Diamond has been sentenced to 25 years in Texas confinement for aggravated sexual assault of a child,” Harris posted on X. “Diamond — a nephew of Karl Malone — trained dozens of NFL players, including Cowboys WR CeeDee Lamb while he was holding out last offseason.”
Renowned NFL trainer Delfonte Diamond has been sentenced to 25 years in Texas confinement for aggravated sexual assault of a child.
— Nick Harris (@NickHarrisFWST) April 11, 2025
Diamond — a nephew of Karl Malone — trained dozens of NFL players, including Cowboys WR CeeDee Lamb while he was holding out last offseason. pic.twitter.com/FQq62k1bmj
Click on ‘Follow Us’ and get notified of the most viral NFL stories via Google! Follow Us
As we all know, Malone impregnated a 13-year-old girl when he was 20.
In 2023, Malone said of his past, “I’m not discussing any of that. I don’t care.”
“That’s my life, it’s my personal life, and I’ll deal with that like I’ve had to deal with everything. So, whatever. Whatever, I’m human.”
As for Delfonte Diamond, he has not only worked with Lamb but also with Houston Texans wideout Tank Dell, Kansas City Chiefs wide receiver Xavier Worthy, Buffalo Bills rookie wide receiver Keon Coleman, Patriots wideout Stefon Diggs, and many more.
Delfonte Diamond Was Posted Online Just This Week

Despite what he was facing, Delfonte Diamond was very active on social media.
Diamond, who is well known in many NFL circles, won’t be training anybody else for a long time after he was sentenced to 25 years in prison for aggravated sexual assault of a child.
Despite what he was going through, he was just living life as normal and posting on Instagram, X, and Facebook.
Just this week alone, he wrote, “God has the final say so!”
God has the final say so!
— Delfonte Diamond (@DelfonteDiamond) April 9, 2025
Coach 💎
He certainly did.
Also Read: Former Green Bay Packers Linebacker Sentenced To 30-Months In Federal Prison On Disturbing Charges