For Purdue's defense to be more successful this season, Neal understands the importance of making an impact. Neal leaning on defensive line coach Kelvin GreenPurdue Boilermakers defensive line coach Kelvin Green leads a drill. | USA TODAY Network via Reuters ConnectNeal may be a veteran on Purdue's defensive line, but that doesn't mean there isn't room for improvement. Over the last eight months, the senior has relied heavily on defensive line coach Kelvin Green to help him develop. Get top Boilermakers stories, expert analysis, and can't-miss moments straight to your inbox for free by signing up for the Purdue Boilermakers on SI newsletter!