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There was more than fighting going on at Raiders practice on Tuesday.

While some of his teammates were exchanging unpleasantries, quarterback Derek Carr was continuing to show an increased familiarity with the offense. It’s the second year that Carr has been working in offensive coordinator Bill Musgrave’s scheme, something that leaves him more comfortable improvising when he finds the initial plan isn’t the best one.

One such instance saw Carr check out of a play in the red zone in favor of calling his own number for a rushing touchdown, a play he said wasn’t installed yet but was something they were prepared for because of the extended time in the offense. Those are the kinds of stamps that Musgrave wants Carr to put on the offense in 2016.

“I think it helps that he doesn’t have to learn a new language again,” Musgrave said, via ESPN.com. “Two years in the league, two different systems. Now this year he can feel like he has a good grasp of it and start putting his own spin on things and can put his own signature on the system. Things that he wants to see or tweak a quarter turn here or there, he can initiate that.”

Carr took a big step forward in 2015 and it’s reasonable to think that remaining in the same system will allow space for further growth this time around. One spot that could use some improvement is his fourth quarter play. He threw seven of his 13 interceptions in the fourth and six came when the Raiders were within seven points of their opponents, which is an area where continuity won’t be prized for a team hoping to end the year with a playoff berth.