Defensive snaps: Gregory & McCourty

DETROIT -- A look at the snaps played by Patriots defenders in the first half, when most of the top players were in the game, and analyzing what it might mean (includes penalties):

CB Kyle Arrington -- 36 of 36

S Steve Gregory -- 36 of 36

DE Chandler Jones -- 36 of 36

DE Rob Ninkovich -- 36 of 36

CB Aqib Talib -- 36 of 36

DT Tommy Kelly -- 26 of 36

LB Dont'a Hightower -- 23 of 36

LB Brandon Spikes -- 23 of 36

DT Joe Vellano -- 23 of 36

CB Logan Ryan -- 19 of 36

S Duron Harmon -- 18 of 36

S Devin McCourty -- 16 of 36

S Adrian Wilson -- 15 of 36

DE Marcus Benard -- 13 of 36

LB Jerod Mayo -- 13 of 36

LB Jamie Collins -- 11 of 36

DT Marcus Forston -- 10 of 36

LB Dane Fletcher -- 6 of 36

QUICK-HIT THOUGHTS: The biggest personnel notes on defense were with starting defensive tackle Vince Wilfork being held out of the game, which gave the coaching staff an extended look at rookie free-agent Joe Vellano. Also, starting linebacker Jerod Mayo only played in the dime package, so rookie Jamie Collins started alongside Brandon Spikes and Dont'a Hightower and Dane Fletcher also came on for two series in the base defense. ... Against a strong vertical passing offense, it's probably not a coincidence that Steve Gregory got the start next to Devin McCourty at safety as they are considered the team's best cover safeties. It will be interesting to see if that changes against teams who aren't as threatening in that area of the game, which could open the door for a bigger safety (e.g. Adrian Wilson) to step in to that role. Wilson played solely in the dime package in the first half, in a linebacker-type role. That bumped Tavon Wilson out of that spot. ... Rookie Logan Ryan served as the fifth defensive back in the nickel. ... McCourty's playing time was limited as it was his first action this preseason as he's been managed closely after offseason shoulder surgery. ... Chandler Jones and Rob Ninkovich, as expected, are the top ends and they won't come off the field often. ... Tommy Kelly looks like a difference-maker at defensive tackle and the type of player who would never leave the field, but the Patriots probably want to find some time to give him a breather at times, which is what we saw Thursday night. ... Marcus Benard came on in sub situations as an interior rusher, which was the niche that Jermaine Cunningham (currently injured) had carved out for himself early in 2012.