Add Vernon Davis to the list of those not thrilled with offensive coordinator Greg Roman this season.

That’s certainly the impression the Pro Bowl tight end gave off today when asked about his 25-catch, 236-yard, two-touchdown season.

“For me, it’s all about coming here, showing up and doing what I have to do to contribute,” Davis said. “As far as not getting the ball, (I) leave it up to the offensive coordinator. It’s his call.”

This season, Davis, 30. is averaging 4.1 targets a game. Last year, he averaged 5.5 targets a game and had 52 catches, 850 yards and 13 touchdowns.

Davis has dropped 6 of 31 catchable passes this season and his 19.4 percent drop rate is the second-highest among NFL tight ends, according to Pro Football Focus. In addition, his blocking, which has been a strength, has declined. According to PFF’s grading system, his run-blocking grade ranks 56th of 65 tight ends.

“I look at myself as a playmaker,” Davis said. “Not just someone who’s blocking. I enjoy it. I would love to be involved a little bit more. I would love that. That would be amazing. But like I said, it’s out of my control. All I can do is come here, show up and take care of my responsibilities.”

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Right tackle Anthony Davis took part in warm-ups for the first time since he sustained a concussion on Nov. 16. Davis will likely be limited in practice.

In addition, cornerback Tramaine Brock (hamstring), who has missed the past four games, was also on hand for the start of practice. Fellow cornerback Chris Culliver (knee) was in a non-contact jersey after exiting in the second quarter of a loss to the Raiders on Sunday. Center Marcus Martin (knee), who also left the game against the raiders, did not practice.

In other injury news, tight end Vance McDonald (back), who was placed on season-ending injured reserve Tuesday, has a disc issue and will undergo surgery, Harbaugh said. Harbaugh also said inside linebacker NaVorro Bowman (knee), who was activated to the 53-man roster Tuesday, wouldn’t practice this week.

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The 49ers signed rookie offensive tackle Chris Martin, 24, to their practice squad. They made the move after the Vikings claimed offensive tackle Carter Bykowski off their practice squad earlier in the day. The 49ers drafted Bykowski in the seventh round in 2013.

Martin has spent time on the practice squads of the Patriots and Texans this season.

Twitter: @Eric_Branch