NAPA, Calif. -- While concerns swirl about the quality, consistency and safety of NFL games overseen by replacement officials, Oakland Raiders DL Richard Seymour offers another level of skepticism.

Integrity.

Seymour, a 12th-year veteran, wonders if the game's integrity will be compromised because he doubts whether the personal backgrounds of replacements have been scrutinized to the degree of the locked-out officials.

"I think the integrity of the game is at stake," Seymour said. "You never know who they know and who they're connected to. And who are their favorite teams.

"To just say we've got some new guys coming in, who knows? They might admire Peyton Manning."

The bulk of the replacement officials are from the college ranks, although from the lower ranks rather than the Division 1-A level. Skeptics, including players, have questioned whether they will adjust well to the speed of the NFL game.

The NFL has said that it isn't concerned, and that having roughly two months before the start of the regular season to train officials -- including preseason games and training camp practices -- will ease the transition.

Seymour doesn't buy it.

"It's just the unknown," he says. "I'm not a fan of the replacements. Our regular refs, they work so hard to prepare themselves all throughout the year. They put in a ton of work to compete at the highest level. I want the best of the best."

The Raiders open the preseason on Monday night against the Dallas Cowboys, which will provide Seymour a much more intimate view of the game with the stand-in refs.