Tight hamstrings are a common issue among all kind of athletes, no matter the sport. Even non-athletes suffer from tight hamstrings, especially professionals who sit for extended periods of time. Foam rolling the hamstrings is an effective solution for this problem.
Stretching may be more beneficial if foam rolling is done prior to the stretch. A study from 2014, Foam Rolling and Static Stretching on Passive Hip Flexion Range of Motion, measures the effects of foam rolling prior to static stretching. The authors found an increase in the hip range of motion after rolling on the hamstring then stretching, compared to stretching alone.
In my experience, tight hamstrings cause lower back pain. Countless times the pain is gone once I take care of my hamstrings. As foam rolling the lower back is something we should NOT do, loosen up your hamstrings is an indirect way to relieve pain and tightness in the lower back area.
Read the main instructions on how to foam rolling, here.