Newton participated in red zone drills, but did not throw any long passes on Sunday while rehabbing from soreness in his right shoulder that stems from rotator cuff surgery in March.
Ajayi wore pads at camp in Davie, Fla., for the first time since the injury, but left practice early because of hydration issues in the 90-degree morning sunshine. Coach Adam Gase said the issue was merely a matter of Ajayi regaining his conditioning.
Ajayi had a breakout season in 2016, when he ran for 1,272 yards and had consecutive 200-yard games.
It's unclear at this point if Newton will participate in this week's scrimmages against the
"It was very positive," Rivera told the team's website after practice. "A lot of good things happened. I'm pleased with his progress."
In other training camp news:
Mathew Stafford was two-of-three passing for 36 yards during his only series, which ended on an interception. The Lions made it look easy. Rudock hooked up with Golladay on a 23-yard TD pass in the first quarter and a 15-yard score in the second.