Lowback, gluteals and hip rotator stretch

Cressey Performance Foam Roller Series

Stretching with Foam Roller

Adductors Stretching and Strengthening

Lower back stretches

Yoga Stretching Exercises

Yoga Stretching Exercises

for stretching flexibility

No More Knee Pain- Corrective Stretching

The top 2 stretches to eliminate nagging aches and pains in your knees

Stretching for adductors

Is Stretching Important?

NYT has a piece about the importance (or lack thereof) of stretching before exercise, here and the study can be found here

Training With the NFL: stretching out the hamstring muscle

Benefits of Stretching

Stretching before exercise will give the following benefits:

1. may improve ROM (range of motion)
   
2. reduce risk of injury
3. prevent post-exercise muscle soreness
4. slow delayed-onset muscle soreness (DOMS)

Wikipedia

Stretching

Stretching Using a Stick

Proper Stretching

Mark Walhberg shows how