The proposed $765 million settlement of NFL concussion claims came under attack again Monday, this time from retirees who said they would get "nothing at all" for nagging health problems that limit their function.

Seven former players filed a motion to intervene in the court case pending in Philadelphia, which aims to settle thousands of claims through a grid-like formula that reaches $5 million for younger retirees with Alzheimer's disease.

The latest objections come from men who can perhaps still work but say they still suffer from headaches, personality changes, trouble multi-tasking and other side effects they link to concussions suffered while playing in the league.

"The settlement provided no monetary recovery -- nothing at all -- for class members suffering from many of the residual effects most commonly linked to recurrent and repetitive mild traumatic brain injury, while releasing every claim these class members may have against the NFL," lawyer Steven Molo wrote in the court filing.

Senior U.S. District Judge Anita B. Brody fears the settlement is too low to cover 20,000 retirees for 65 years, as planned. Lawyers for both the NFL and the lead players' group hope to convince her otherwise.

The seven ex-players in Monday's motion -- Roderick Cartwright, Sean Considine, Alan Faneca, Ben Hamilton, Sean Morey, Jeff Rohrer and Robert Royal -- weren't part of the original litigation.

The vast majority of the proposed $765 million fund would compensate former players with one of four neurological conditions: Alzheimer's disease, Parkinson's disease, Lou Gehrig's disease or advanced dementia.

Awards could also reach $4 million for deaths linked posthumously to chronic traumatic encephalopathy. At the low end, an 80-year-old with early dementia would get $25,000.

Retirees without symptoms would get baseline screening and follow-up care if needed. The agreement also sets aside $75 million for medical exams and $10 million for medical research.

Bengals: Cornerback Leon Hall is happy with his recovery from a torn Achilles tendon and expects to be ready for the start of training camp in July.

Hall joined Bengals teammates for a voluntary workout on Monday. He's running on schedule and expects to be ready for the season. Cincinnati holds its first training camp practice on July 23.

The 29-year-old cornerback is going through a familiar comeback. He has torn both of his Achilles tendons in the last three years.

"It's easier in that sense, just as far as I've been through it," Hall said. "I know if something is going wrong on a certain day that it's not the end of the world. It's not going to affect me negatively in the long run."

Draft: Former University of Miami offensive tackle Seantrel Henderson appears to be in trouble again.

According to ESPN's Adam Schefter, Henderson, once projected to be a top NFL prospect, tested positive at the combine for smoking marijuana.

Henderson was suspended three times during his career at Miami for violating team rules, and he later told the South Florida Sun Sentinel that those were for smoking marijuana.

"I felt like I had a lot of maturing to do and I feel like I have," he said, via the Florida Times Union, in January at the Senior Bowl. "Now I'm ready to move on to the next level."

The onetime first-round prospect could tumble all the way out of the draft at this point.

Eagles: Philadelphia has signed former Army ranger Alejandro Villanueva to a rookie free agent contract.

The 6-foot-9, 277-pound defensive lineman spent the last four years as an active member of the U.S. Army. He served three tours in Afghanistan and last played football as a wide receiver at Army in 2009.

Villanueva was recently promoted to captain. The 25-year-old has earned many honors for his service, including the Bronze Star Medal for Valor.

Villanueva began his career playing the defensive line, moved to left tackle and finished at wideout his senior year. He grew up in Spain and didn't play football until his family moved to Belgium.

The Los Angeles Times contributed to this report.