Reiss details it here
http://www.espn.com/blog/new-england-patriots/post/_/id/4798757/patriots-offensive-tactic-with-shea-mcclellin-sparks-thoughts-of-ravens-playoff-game
On one play in the first quarter, the Pats replaced Thuney with Shea McClellin, who split wide. Von Miller "covered" him even though he was ineligible.
What made the play legal despite the rule change last year is that McClellin was not an eligible receiver by virtue of his number, so he didn't have to declare himself ineligible (like Vereen did in 2014).
How pissed would Harbaugh have been?
Here is a screen shot
http://www.espn.com/blog/new-england-patriots/post/_/id/4798757/patriots-offensive-tactic-with-shea-mcclellin-sparks-thoughts-of-ravens-playoff-game
On one play in the first quarter, the Pats replaced Thuney with Shea McClellin, who split wide. Von Miller "covered" him even though he was ineligible.
What made the play legal despite the rule change last year is that McClellin was not an eligible receiver by virtue of his number, so he didn't have to declare himself ineligible (like Vereen did in 2014).
How pissed would Harbaugh have been?
Here is a screen shot