There are so many times it’s tough to keep up, but here is the list of 20 players who were held out of practice Sunday, either because of injury or to get a rest:

Defensive linemen (7): NT Johnny Jones, DL Brandon Bair, DT Myles Wade, DT Pat Sims, DT Stacy McGee, DT Vance Walker, DE Lamarr Houston.

Linebackers (4): Sio Moore, Miles Burris, Billy Boyko, Kaluka Maiava.

Defensive backs (2): CB Mike Jenkins, CB Tracy Porter.

Offensive players (7): WR Connor Vernon, RB Latavius Murray, RG Mike Brisiel, C-G Alex Parsons, OT Menelik Watson, WR-RS Josh Cribbs, G Lucas Nix.

— Brisiel’s absence gave Allen a chance to get a look at Khalif Barnes at guard. Barnes, whose starts have all been at tackle, last remembers playing inside “three or four” years ago against the San Diego Chargers after two players went down due to injury.

“It’s cool. Things happen a little faster. I haven’t done it in a few years, but I’ve just got to get the footwork down and notice that things happen a little quicker inside as opposed to the edge,” Barnes said. “The more you can do the better it is. You just make yourself more valuable. I’m just trying to come in and do what they ask me to do.”

Said Allen: “He’s a big guy that’s got some power, so I think that’s something we want to look at. Him moving inside some, and kind of mix and match the lineups a little bit and see what we got. That was something that we had kind of planned on doing throughout camp and we took the opportunity to day with Brisiel being down to put him in there and see what he can do.”

With consistency being preached from Day 1 of training camp, Allen was asked which players have been the most consistent. Although he as reluctant to give names, Allen did anyway, naming SS Tyvon Branch, DE Jason Hunter, MLB Nick Roach, Barnes, C Stefen Wisniewski and RB Darren McFadden.

Given a little more time, the guess here is Allen would have also named FS Charles Woodson, WR Rod Streater and LT Jared Veldheer.

— Interesting that the two Raiders who have played the most games _ Woodson and DE Andre Carter _ have not missed a practice.

— Watson, who along with Sims and Burris has not practiced through the first nine sessions of camp, will have a difficult time mounting a challenge for the right tackle position considering his college experience at Florida State is just 13 games.

“He’s way behind. He went through the offseason program, but here we are in the second week of camp and he hasn’t seen a down yet,” Allen said. “He’s got to get healthy and got to get back out here. It’s frustrating to me, but it’s frustrating for him too.”