ALAMEDA -- If Raiders defensive end Matt Shaughnessy is looking at Chargers undrafted rookie free agent left tackle Michael Harris as fresh meat, he's doing a good job suppressing his appetite in public.
"I mean, he looked pretty good on film," Shaughnessy said Friday. "Obviously they're very happy with what he's doing, so he's playing."
The Raiders were able to exploit a substitute left tackle in last season's 24-17 win in San Diego. After starter Marcus McNeil went out early with a season-ending neck injury, nickel pass rusher Kamerion Wimbley beat backup Brandyn Dombrowski for four of the six sacks Oakland got against quarterback Philip Rivers.
"I'm not Kam," Shaughnessy said. "We're totally different people."
In this case, Harris, 6-foot-5, 318 pounds, has been prepared to start, as Jared Gaither has been out since early in training camp with a back injury.
"He's a very mature guy," Chargers coach Norv Turner told Bay Area reporters by conference call. "You'd like him to be in a position where he's learning and waiting his turn, but he's doing a good job preparing to play."
Harris was undrafted out of UCLA, a school which hasn't had an offensive lineman selected in any round of the draft since 1999. He was nowhere to be found on the All-Pac-12 team and had four false starts against Utah.
He's likely to get plenty of help from tight end Randy McMichael.
"Starting Monday, I have a chance to show the world who Michael Harris is, and show the world I belong in the NFL," Harris told the Los Angeles Times.
Defensive coordinator Jason Tarver said the temptation to overload a defense to take advantage of Harris is tempered by Turner's play-calling acumen and the likelihood he'd exploit the opposite side.
"He's got in front of the guy he's blocked for the most part in the preseason," Tarver said. "We know he's out there. They know he's out there. It's a chess match to see how much they help him, how the scheme goes around him and what players we can match on him."
"He didn't take as many reps as he might normally take, but he practiced," Allen said.
One day after sticking with short and intermediate routes, Moore extended himself more on Friday.
"I'm giving it all I've got right now, really gaining confidence in myself, seeing what I'm able to do, if I'm able to pick it up or not, and just letting it go from there," Moore said.
Moore said it isn't matter of what he can do so much as how long he can do it.
"I'm able to make all the cuts," Moore said. "It's being able to do them over and over consistently when it gets tired."
"They'll both be up for the game to help us inside," offensive coordinator Greg Knapp said.
Knapp said one would start, and the other would be a backup center and guard.
Wisniewski had his only start at center in last year's win in San Diego.