Static stretching can help prevent injury risk if it increases mobility/range of motion.
Improving mobility allows for better positioning, which allows for enhanced movement, which leads to improved coordination, power and strength, and decreased risk of injury.
When you are flexible and your muscles are loose, you are much less likely to pull or "tweak" a muscle, while working out or just doing daily tasks.
The following exercises target areas of need for most people: calves, hips and posterior chain (hamstrings and spine).
Perform each stretch for 10 reps, holding stretches for about 10 seconds each.