He missed the final eight races of last season with injury .
It was Roczen 's fifth career win and his first since the second race in Anaheim in January of the 2015 season , 18 races ago .
Roczen missed the final eight races of last season with injury .
It was Roczen 's fifth career win and his first since the second race in Anaheim in January of the 2015 season , 18 races ago .