Complex sentence: During the 2011 season Chris Johnson struggled throughout the season under offensive coordinator Chris Palmer, after a frustrating season Johnson elected to participate in the Titan's off season training program in preparation for the upcoming 2012 season.
Split into simpler sentences: During the 2011 season, Johnson struggled throughout the season under offensive coordinator Chris Palmer. After a frustrating season, Johnson elected to participate in the Titans' off-season training program in preparation for the 2012 season.