History of occasional back muscle cramps spams which are likely due to lower vertibrae irregularities. can these spasms cause low back pain by pulling the spine out of alignment and or be bad enough to make it stay that way and need correction?

Focal muscular spasms can indeed cause secondary asymmetries of the lumbar spine, but these are triggered by underlying pathology, such as discogenic protrusions or herniations, facet impingement, trauma to muscle, even secondary sacroiliac dysfunction. A physiatrist can help provide diagnostic studies and rehabilitation interventions.

More often than not, muscle spasms/cramps are the result of exceeding a muscles endurance and muscle deconditioning. For that reason, the best form of treatment is exercise that not only increase his endurance, but also increases strength/power. Ultimately, this will provide greater stability for the back and reduce further development of lower vertebral irregularities and misalignment.