But there's still lots of work to do, he said.
The team worked out for almost two hours in shorts and shirts but will put on pads today. The only missing player was nose tackle Aubrayo, who has yet to sign his one-year tender as the Niners' franchise player.
"It was a good first day," said Singletary, who is beginning his second full season as head coach. "There was a lot of energy, good communication, and we're off to a pretty decent start. Our guys have a pretty good idea of what they're doing."
Singletary had intended to begin camp today, but they added Sunday's practice because some plays were installed Saturday night and more plays were scheduled to be added Sunday evening. The team's coaches didn't want to squeeze in two days of new material on Monday.
As it was, everything went smoothly. Quarterback Alex Smith looks reasonably sharp, although he threw one interception, and Singletary said there was a sense of continuity with few changes among coaches or players.
"I think that would be the word that connects everything we did last year – take in the positives and build on those things," he said. "Let this be a continuation of building and learning rather than something new where you're trying to learn plays. That's a good feeling."
Unlike last year, when wide receiver Michael Crabtree went missing for the first 71 days while negotiating his rookie contract, all eight draft picks were in attendance. Tackle Anthony Davis and guard Mike Iupati, the club's first-round selections, signed their contracts on Friday and worked out with the second unit.