The Rams dominate time of possession
And Seattle is going to need those explosive plays because the Rams are going to eat up a lot of clock against the Seahawks' defense. Seattle allows 45.5 percent of third downs to be converted (31st) and the Rams are 10th in the NFL in converting third downs (42.1). Seattle is also 29th in allowing opponents to keep the ball for an average of 2:57 a drive.
Matthew Stafford is the worst kind of quarterback for Seattle to face as well. He knows his offense extremely well, both potential and limitations, and he has been around the league long enough to know when to not try to do too much. He will use what Seattle's defense gives him and he will be patient and not try to go big all the time.
Plus, his best receivers, Cooper Kupp and Puka Nacua, are both truly possession receivers, able to consistently pick up third downs if a cornerback plays off them enough on third and short. My guess is that Los Angeles will have a lot of these kinds of situations on Sunday and take advantage of most of them.
The hope is that even if the Rams do control the clock and if several of those drives end up with points being scored they are field goals and not touchdowns. The Seahawks red zone offense is going to need to be terrific.