In case you ever wondered why folks recommend foam rolling - here is an easy blog post discussing the benefits of during foam rolling.
We use both tennis balls and foam rollers before we ever lift. We start with the tennis ball and work the feet, then move from upper back down your body and the result, you feel amazing after a workout.
Yes - tennis balls, lacrosse balls, and golf balls for feet, calves and butt checks (ouch!) and foam rollers for everything else.