Gronkowski was on the field for more than 30% of the offensive snaps (337 plays), and touched the ball or was targeted with a pass 19 times for a total of 52 yards. The other 318 plays, his role was almost exclusively as a blocker. For those 318 plays, he rates an F. Goal line and second-level blocking were the main problems with our running game, and Gronkowski figured prominently in both.
In 2009, Dallas scored a touchdown on 36% of its runs from the 2-yard line or closer. Not great, and then it got worse. In 2010, that went down to 22%, mostly due to going 3-for-14 on runs with a fullback in the game. Gronkowski was not the FB for all 14 of those plays; we stopped using him in goal line after the disaster at Indy.
In 2009, with Anderson taking on the linebackers, Dallas ranked 3rd in the league in second-level yards. In 2010, with Gronkowski, we fell to 20th. For all the (well-deserved) criticism heaped on the OL, if you're looking for the single biggest factor in the decline of our running game as measured in yards per carry, it was those second-level yards.