Fitness and Performance:
Sled Push, Pendlay Rows, Nose-and-Toes handstand hold
Calories on Rower, Abmat Situps (P: K2E), Calories on AB
A good read from BreakingMuscle: http://breakingmuscle.com/mobility-recovery/2-overlooked-reasons-your-hamstrings-are-tight
Those tight hamstrings might be a sign of instability through the lower lumbar.
Change up to Mobility. We will still have them on Saturday mornings, but it will be only 1 class at 8am (rather than 7 and 9) so people can WOD at 9 if they wish AND get to sleep in that extra hour.