Fantasy Upside
C.J. Prosise had a great senior season at Notre Dame which made him into a third round draft pick of Seattle. He most likely will be the backup for Thomas Rawls and if Rawls is not 100% healthy after a broken ankle, Prosise could get early-down carries. When Prosise is most likely to see the football is on third down. He was a proficient pass catcher for the Irish (actually started his career as a wide receiver) and actually led the team in reception yardage average in 2014.
Fantasy Downside
He's a rookie and you never know what a rookie's role will be until the season actually starts. Veteran Christine Michael's experience gives him an edge over Prosise so if the rookie struggles in training camp, Prosise could end up being the third back on the depth chart.
2016 Bottom Line
It looks good for Prosise to get some carries this season and more important, some receptions on third down. Overall, he is late round draft pick that might have some more value in a PPR league if he is consistently the third down back. Rawls is going to be given every opportunity to be a top 10 back in the league so Prosise might have to sit back and wait his rookie season. Definitely has sleeper potential if Rawls is not healthy, but don't take him any earlier than the 13th round.