Why it happened: Griffin had little time to do anything and the receivers were not yet turned around. Right guard Brandon Scherff had the same issue: His hands are too wide, leaving his chest exposed, which the defender used to drive him back into Griffin. Tough to blame this on the quarterback, though it was a good chance for him to show any improved pocket presence/movement if nothing else - the opening was to his right (easy to see after the fact, no doubt). Regardless, he needed to take better care of the ball.
Carrier is a former college receiver at Division III Beloit and spent two years on practice squads before sticking with San Francisco. He caught nine passes for 105 yards last season and is considered more of a pass catcher than a blocker. He can also help on special teams.
Defensive end Jason Hatcher: He looked good on some pass-rushes Thursday and I want to take more of a look at his game on early downs, too. He's excited to play in this defense -- he's mentioned it several times -- and said it fits his game well. At his age (32), the Redskins have to do a good job keeping him fresh for the nickel packages. But that's where their depth helps. Anyway, I'll have more on him later in the day.
Keim: I don't think it's the whole group. I also don't think the run blocking was good enough by the starters Thursday (though a couple times it was one man losing his block). Heck, they struggled to run the ball in the first quarter vs. Detroit and that left them in bad passing situations. With left tackle Trent Williams in the game, life is much better. But then you have to worry about the right side. They could be really good eventually, but for now they're still learning.
I will inject one more thing to think about here. Scot McCloughan is building the Redskins to be a tough, physical team featuring power run blocking and an attacking defense. That style of football is designed to wear teams down over four quarters. In the preseason, with players shuffling in and out from beginning to end, the physical nature is less of an advantage.