Like most other teams around the league, the New England Patriots officially opened their training camp Thursday morning. 

The Pats took to the practice field outside of Gillette Stadium, early, with fans lined up on all sides to see their team kick off the preseason.

While a handful of players didn't actively participate, due to injuries, all members of the team's 90-man roster were in attendance, with the exception of third year wide receiver Malcolm Mitchell.

With his name popping up in trade rumors the past few days, the wide out, who has struggled mightily to stay healthy throughout his football career, was nowhere to be seen.

As for the players that were on the field, newly acquired offensive tackle Trent Brown got the nod to join the starting lineup at left tackle, as he competes with rookie first round pick Isaiah Wynn for the spot.

Quarterback Tom Brady and tight end Rob Gronkowski had productive days, according to reports.

Aside from those notes, it appears that second year Patriot Phillip Dorsett got some extended work in the slot, a position not previously considered to be where he would see much action.

That's all just Day 1 of a long process, however. There's plenty of time for more story lines to develop. Stay tuned.