2016: Rainer will serve as a reserve walk-on inside linebacker as a Junior at USC in 2016.
2015: Rainer was a reserve walk-on sophomore linebacker in 2015. He saw brief action in 2 games in 2015 (versus Utah and Notre Dame), he made 4 tackles.
HIGH SCHOOL: He made the 2013 Evergreen League first team, and the New England Preparatory School Athletic Council defensive first team as a senior linebacker at Hebron Academy in Maine he had 102 tackles, 7 sacks, 2 forced fumbles, 3 interceptions.
As a junior, he had 88 tackles, 5 sacks, 1 forced fumble, 2 interceptions.
PERSONAL: He is a communication major at USC.