He struggled at Polk also, from 2014 to 2017 he was 7-34 including two winless seasons. His last year at Polk was 6-5. I'll say this, and I have no facts to back up my opinion** I think he left polk because of administration reasons. Their were some rumors flying around that the soccer parents where causing a stink wanting to use the football stadium for games but they still expected Derrick to maintain the field. I heard he denied those rumors is why he left but only he knows the real reason.