Baseball pitching motion troubleshooter Angel Borrelli discusses what pitchers should be doing in the offseason. Trending topics: the mechanical flaws that should be corrected during the offseason by Noah Synergaard, Alberto Osuna, and Jeff Samardzija. Teaching Moment: when pitchers should start throwing if they participate in a fall season, and what pitchers should be doing in the gym during the offseason. Location Segment: putting it all together -- an efficient motion will result in good deception, location, and peak velocity.