USC's OL as was stated above is strongest on the left side, which is where most OLs need to be strongest. USC has had some issues at center and in the interior: their pre-season projected RG (Mike Matulis) has been injured most of the season, and was expected to see some snaps last week versus Auburn but was held out. Word is he's going to play and perhaps even start, but we'll see how that goes...
At Center, USC has been rotating some younger players for the last 2 seasons: Cody Waldrop was slated to start there last season as a RS-Fr., but dealt with injuries and was replaced by the #2 back-up, RS-Fr. Clayton Stadnick. This season Waldrop continued to struggle coming into the season, and RS-Fr. Alan Knott has been starting as much if not more than anyone else. Waldrop was shifted over to RG after Matulis went down, and continues to struggle there.
Reportedly, Knott was experiencing cramping in his hands towards the end of the game last week, which was the reason for his grounders to Thompson...
USC is currently tied for 3rd in the SEC with 35 tackles for loss allowed, and 6th in sacks allowed with 13. IMO, a number of those sacks have been due more to Thompson back-peddling as hard as he can when pressure advances, holding onto the ball until he's fairly sure he's lost enough yardage, and then he lets the rushers sack him. Anyone who's watched entire games with Thompson in command will know what I'm talking about: he has a huge issue with this, and doesn't look to correct the issue until just after the season has ended, so USC will have to live with it.
Tennessee by comparison is ranked 14th in the SEC in TFL allowed with 67, and 14th in sacks allowed with 32. The only saving grace here is, USC is dead last in the SEC in both TFL and QB sacks produced by it's defense, so it may all cancel each other out: the movable object versus the resistible force....