The Caps have lost 7 in a row. They've scored 1 or fewer goals in six of those games. Over the seven game losing streak, they have 8 total goals. They're only 4 points back of the current 56 point bar to make the playoffs, but fading quickly. (Come back soon, Ovechkin... hopefully tonight.)
Interestingly, they have just 1 UFA this offseason and that's Grabovski. There has been talk of mutual interest between the Caps and Grabo in signing an extension, so I'm not even sure they'd deal him as a rental. Otherwise, there just aren't that many pieces to deal. Neuvirth could probably be had for a pick to a team in need of goaltending, or John Erskine to a contender in need of a tough depth defenseman.
Otherwise, underperforming forwards Brooks Laich and Martin Erat seem like the other candidates barring a major shake up. Both Laich and Erat have cap hits of $4.5 that extend beyond this year. The Caps seem to still like Laich, whereas Erat has been the odd man out for much of the year despite his uptick in TOI lately. I can't tell if they are finally coming around on him or just showcasing him. After sitting out as a scratch for a handful of games, Erat has returned and averaged 16:00/game over the past four games. Part of that is due to Ovechkin being out, but the increase in minutes began before Ovechkin left the lineup. I don't even know if either Laich or Erat has positive or negative trade value at this point. Laich has just 12 points in 46 games combined between last season and this one. The former ironman has missed 53 of the last 99 games though. He's still a big penalty killer, gets some power play time, and can play all three forward positions in addition to being a team leader. I haven't been enamored with his game this year (nor last), and the downside is that he's owed $4.5 for the next three seasons. Martin Erat has been held off the goal sheet this year, and that giant goose egg is pretty glaring. I believe he has the most games played by a forward without a goal this year. In his 43 games (much of it spent with minimal minutes and on the 4th line), he has 0 goals and 16 assists. His assists are still fourth on the Caps among forwards and fifth overall on the team. I actually like his game, think he is a solid creator, and think he's played pretty well, but other Caps fans seem to disagree/hate him. He's on the books for next year as well, but again, I don't know how much value he has. There's also the question of whether McPhee is willing to deal Erat after giving up a top prospect less than a year ago...