MIAMI GARDENS — The Miami Dolphins, mired in a three-game losing streak and desperately searching for something positive amid their disappointing 2-6 start, venture to Los Angeles in hopes of a revival, a spark. Players say their spirits remain high heading into their nationally-televised Monday night game against the Rams (4-4). But their playoff hopes remain low. And that’s what this is about at this point, igniting playoff hopes, breathing life, optimism and excitement into a season on life support. The Dolphins, who started 8-3 and 9-3 the previous two seasons and had Super Bowl hopes for this season, would, for all practical purposes, be out of the playoff race with a loss Monday. Granted, they’re probably not really out of the race until they get their ninth loss, which would ensure a losing record. But to think the Dolphins could absorb a loss Monday and then win seven of their last eight games, finishing with nine wins, is pure folly. The Dolphins badly need a victory against the Rams. “I think we have that urgency, like we understand the situation,” left tackle Terron Armstead said. Right tackle Austin Jackson will miss the game with a knee injury.