ALAMEDA It had been more than a month since Raiders wide receiver Denarius Moore practiced.
And no, Moore did not enjoy the time off.
The second-year player, who injured his hamstring in training camp Aug. 4, returned to practice in a limited capacity Thursday.
He wasn't happy being a spectator, but Moore made the best of his time getting healthy.
"It was real frustrating seeing your teammates out there going through it day by day and then you're just sitting on the sideline doing nothing," Moore said. "It depends on how you look at it. You can get mental reps. You can find something else to do like lift weights."
What the Raiders are looking at without Moore in the lineup is a group of inexperienced receivers.
Without Moore, the only healthy contributor from last season's wide receivers has been Darrius Heyward-Bey.
Jacoby Ford (foot) has been out since Oakland's second preseason game.
The injuries left undrafted rookie Rod Streater to play with the first-team offense.
When healthy, Moore adds big-play ability. In 13 games, he had 33 catches for 618 yards and five touchdowns as a rookie.
"It's good to see him out there getting reps, getting his legs back out there underneath him," said quarterback Carson Palmer. "He's going to need that. You lose football shape really fast, and it's hard to get it back."
Raiders coach Dennis Allen said Moore would be a game-time decision for the season opener Monday night against the San Diego Chargers at O.co Coliseum.
Moore is listed as a starter on the depth chart, but with his injury and Ford still not practicing, Streater is next in line to start.
"(Moore) moved around pretty well (Thursday)," Allen said. "We're going to keep taking a look at him and keep evaluating him. The good news is we don't have to make any type of decision until game day."
Moore said he didn't test his hamstring running deep routes, one of his specialties. The cautious approach has worked so far, he said.
"I think it was the best to do that right there to make sure it was 100 percent and get confidence back in my hamstring when I got back out there," Moore said.
Oakland also signed wide receiver Derek Hagan, who played six games for the Raiders last season before being cut when former coach Hue Jackson brought in T.J. Houshmandzadeh.
Hagan had been one of the most consistent Raiders last season and was surprised to be released.
"It's just one of those things that obviously I can't control," Hagan said. "That stuff happens. I'm definitely not the first guy to get cut, and I'm not the last. It's happened to thousands of guys before me. It's just one of those things you got to deal with and you got to move on."
To add Hagan, the Raiders released cornerback Coye Francies (Cordova High School).
Notes Wide receiver Juron Criner (ankle), defensive tackle Richard Seymour (knee) and guard Cooper Carlisle (back) were limited in practice.
Kicker Sebastian Janikowski (left groin), tight ends David Ausberry (shoulder) and Brandon Myers (shoulder), and center Stefen Wisniewski (calf) participated fully.
Wisniewski missed the final two preseason games because of his injury.
Rapper and noted Raiders fan Ice Cube will perform before Monday's game. Gene Simmons of Kiss will sing the national anthem.