Watched the entire Dallas game last night. As people have mentioned here, Marchie was the big name among former Cyclones with 2 catches on 3 targets for 36 yards. He also looked aggressive when blocking - perhaps a bit too aggressive at times and looked like he was borderline holding. His defender could be seen after several plays looking toward his bench or the refs in a "do you see what this guy is doing to me?" gesture. Aside from the possible leg injury noted above, another piece of tough news for Marchie is that one of his competitors for the last WR spots - Lance Lenoire - has had a really good preseason and continued that reputation with several nice grabs and a touchdown last night.
Lanning was in for several series, but later in the game Dallas was in the nickle quite a bit, and he came off the field in those situations. He didn't have a particularly good game. He seemed to be in the right place most of the time, but didn't finish plays when he had the opportunity - especially on the one run where he read the play, was in the backfield, and whiffed on what would have been a tackle for loss. He was on the punt team quite a bit, so that is good news for his chances of being a special teamer. He also was not in when the 49ers easily strolled down the field to win the game, so that is also a relief.
Campos play the last quarter and a half at left tackle. He wasn't terrible, but it seemed like he was always about a half step slow and just about to lose contact with his assignment. To his credit, there were no obvious plays where his man simply beat him to the runner or QB (unlike a couple of other late-game Dallas linemen.)