I seriously doubt it. A rookie being a starter week 1 on a Belichick team is rare especially for a seventh round draft pick. Even first round picks like Vince Wilfork and Richard Seymour got limited playing time early in their rookie season.
Could Roberts emerge over the course of the season? Sure. But I really doubt he will be a day one starter. I am leaning to him not even being active week 1 even if by week 17 he is the Pats #1 CB.
Just to put his into context......you can certainly see patterns based on need......
It would appear to me that if the dude can play, he'll be in there....some pretty notoriously bad rookies got some serious starting time
rookies with playing time under BB:
2000 - JR Redmond - 16 games / 5 starts
2001 - Richard Seymour - 13 games / 10 starts
2001 - Matt Light - 14 games / 12 starts
2002 - Deion Branch - 13 games / 7 starts
2002 - Daniel Graham - 12 games / 6 starts
2002 - Jarvis Green - 15 games / 4 starts
2003 - Ty Warren - 16 games / 4 starts
2003 - Eugene Wilson - 16 games / 15 starts
2003 - Asante Samuel - 16 games / 1 start
2003 - Dan Koppen - 16 games / 15 starts
2003 - Bethel Johnson 15 games / 5 starts
2004 - Vince Wilfork - 16 games / 6 starts
2004 - Randall Gay - 15 games / 9 starts
2005 - Logan Mankins - 16 games / 16 starts
2005 - Nick Kaczur - 14 games / 11 starts
2005 - Ellis Hobbs - 16 games / 8 starts
2005 - James Sanders - 10 games / 2 starts
2006 - Laurence Maroney - 14 games / 900 yards of offense and 7 TD's
2006 - Ryan O'callaghan - 11 games / 6 starts
2006 - David Thomas - 16 games / 3 starts
2006 - Stephen Gostkowski
2008 - Jerod Mayo - 16 games / 16 starts
2008 - Benjarvus Green-Ellis - 9 games / 3 starts
2008 - Matt Lavoir - 16 games / 2 starts
2008 - Gary Guyton - 15 games / 2 starts
2008 - Jonathan Wilhite - 16 games / 4 starts
2009 - Ron Brace - 9 games / 2 starts
2009 - Darius Butler - 14 games / 5 starts
2009 - Patrick Chung - 16 games / 1 start
2009 - Sebastian Vollmer - 14 games / 8 starts
2009 - Julian Edelman - 11 games / 7 starts
2010 - Devin Mccourty - 16 games / 16 starts
2010 - Brandon Spikes - 12 games / 8 starts
2010 - Rob Gronkowski - 16 games / 11 starts
2010 - Aaron Hernandez - 14 games / 7 starts
2010 - Jermain Cunningham - 15 games / 11 starts
2010 - Zoltan Mesko
2011 - Nate Solder - 16 games / 13 starts
2011 - Sterling Moore - 6 games / 3 starts
2012 - Alphonso Dennard - 10 games / 7 starts
2012 - Dont'a Hightower - 14 games / 13 starts
2012 - Chandler Jones - 14 games / 13 starts
2012 - Tavon Wilson - 16 games / 4 starts
2013 - Kenbrell Thompkins - 12 games / 8 starts
2013 - Aaron Dobson - 12 games / 9 starts
2013 - Josh Boyce - 9 games / 3 starts
2013 - Jamie Collins - 16 games / 8 starts
2013 - Chris Jones - 13 games / 11 starts
2013 - Joe Vellano - 16 games / 8 starts
2013 - Logan Ryan - 16 games / 7 starts
2013 - Duron Harmon - 15 games / 3 starts
2014 - Dominique Easley - 11 games / 2 starts
2014 - Cameron Fleming - 7 games / 2 starts
2014 - Bryan Stork - 13 games / 11 starts