Pec Minor Lacrosse Ball Barbell Mobility WOD October 12, 2012 By Gregor Winter Kelly Starrett has a MWOD to work your tight pec minor area. Same contraption as they used in the First Rib Barbell MWOD, using a lacrosse ball taped to a barbell. In addition to that they also have a mobility test, which I failed. Kettlebell Overhead Squats. Damn you Mobility demons!