This seems to be mostly just a list of people who lost. Maybe the more interesting question is - who lost but still has a potentially bright career ahead of them?
Horsford will probably win back his seat in 2016. Gallego will too if he decides to run, but idk if he's interested or not. Joe Garcia could probably retake his seat considering that he only lost 51-48, IIRC. My guess is that Barrow probably won't run for anything again (like Jim Marshall after 2010) and I think he'd have a tougher time running against an incumbent in that seat. Doug Owens probably earned the right to make a run for something else (albeit possibly just a suicide run for Governor). Enyart and Schneider could probably retake their seats, but I suspect someone else will run in those districts in 2016. Pat Hays can probably run for something in Arkansas down the road. I doubt he'll run for anything else after this, but a Begich vs. Young race would be epic. Shea-Porter will likely run in 2016 and go down in flames in the primary. Westrom would be a strong candidate in MN-7 if Peterson retires. If Bera loses, he could very well retake his seat in 2016. I could see Djou making a suicide run for Governor in 2018. Ro Khanna will probably pop up again somewhere, unfortunately.