One of the things I always have my runners do is keep the tissue quality of their quads loose as this is one of the main sources of shock absorption on landing.
Recently, I've had my cyclists start to roll out their triceps. I think these are the shock absorbers for the bikers upper torso I've liked what I've seen in preventing mid back pain and upper trap pain as well. The triceps can be a difficult area to roll, so instead of rolling you can try more of a pin and stretch type strategy. Pin a lacrosse ball under the triceps and straighten the arm. Repeat for about a minute.
If you are a cyclist and suffer from mid back, upper trap or neck pain, try this simple strategy to see if it helps. I think it will.