It was Rookie Night at C-Link, with most of Seattle’s draft class and a few other newbies showing pretty well in the Seahawks’ first preseason game, a 19-17 loss to Indianapolis.

Third-round pick Rasheem Green was in on two sacks, including one with sixth-rounder Jake Martin; fifth-rounder Shaquem Griffin led Seattle with nine tackles; and fifth-rounder Michael Dickson boomed three punts for a 47.3 average, landing one inside the 20.

First-rounder Rashaad Penny showed good feet, even if he didn’t gain much ground (16 yards on eight carries), and Trey Flowers played pretty well for his first game as a corner.

“The young guys did really well. The draft picks were all involved with doing good stuff tonight,” Pete Carroll said. “They have been looking that way in practice as well, so it’s not really a surprise. It’s just really pleasing to see it showed up at game time. That’s very promising for us.”

With Frank Clark out, Green, Martin and fellow new guy Barky Mingo all provided pressure. Green, playing Michael Bennett’s old outside-in role, had seven tackles and 1.5 sacks — one from the outside and the half from the inside with Martin coming off the edge.

“Those are guys we really needed to see,” Carroll said of the new pass rushers. “They’re all additions to our team. They had looked like they could show a spark in the pass-rush game, and I thought they definitely did.”

Branden Jackson and Quinton Jefferson also played well — Jackson tallying four stops.

Griffin led the team with nine tackles, after replacing K.J. Wright on the second series.

“He was very active,” Carroll said. “This is what he looks like in practice. He’s really fast. By understanding the scheme, he’s utilizing his opportunities to really be on the attack. He’s a weapon in that regard.”

Flowers, a 6-3 safety converting to corner, played well, other than a legitimate PI penalty. He kept receivers in front of him and didn’t get beat.

“He was out there for the entire half playing football. I thought he did well. … Pretty good first outing,” Carroll said.

Dickson, the favorite to unseat senior Seahawk Jon Ryan, boomed the ball and also tried a drop kick on a late kickoff as Brian Schneider played around with the new kickoff rules. Ryan is not going without a fight — he averaged 44 yards on three punts — but Dickson is a special weapon and it is obvious the coaches are going to try to find ways to use him.

Penny didn’t get a lot of room to run, but he did show well as a pass blocker on Russell Wilson’s TD pass to Nick Vannett.

Chris Carson, however, looked strong in his first game since a broken leg ended his rookie season early.

Carson gained 26 yards on four runs, including a 12-yard dash on the first series. That big run came behind a downfield block by D.J. Fluker, who can move pretty well for 350 or whatever he is.

“Chris looked really good. Rashaad had a chance and Mike (Davis) had a chance to do some stuff,” Carroll said of his backs. “I thought they all showed like we’ve been seeing. I think it’s very promising.”

Davis took the roster lead on the always-injured C.J. Prosise, who was sidelined by a hip problem for this one.

Within the game, the Hawks lost a couple of backup tackles to injuries. Isaiah Battle suffered a knee sprain and rookie Jamarco Jones got rolled up on and suffered what appeared to be a significant ankle sprain.

Other notables from this one:

J.D. McKissic was the primary return man — he brought one back 30 yards. Carroll said he thinks the new kickoff rules are going to favor return teams, making it a little more wide open.

Justin Coleman reminded everyone he will be a big-play force. He made back-to-back plays on the first drive, a tackle for loss and a pass breakup.

Camp star Tedric Thompson didn’t make any big plays, but he rocketed in to make a couple of tackles from his deep spot. “He seemed like he was in great spots and his position was fine,” Carroll said.

Vannett looked good, catching a couple of balls and scoring. He told Q13 that he has felt better in this camp than at any point since he has been a Seahawk. With Jimmy Graham and Luke Willson gone, he seems primed to finally show what he can do.

Rookie Will Dissly also caught a couple of passes, showing why he has received accolades during camp.

The new helmet rule came into play twice, the Hawks on either side of it. Both calls were legit, with Indy’s Shamarko Thomas being ejected for spearing David Moore after Moore dropped a pass in the fourth quarter.

“There’s a couple of learning opportunities on this film for everybody,” Carroll said.

As for the anthem issue, Duane Brown and Jefferson stayed in the locker room and said they will continue to do so all season to protest social injustice.

Other injured players who did not play: Neiko Thorpe, Trovon Reed, Maurice Alexander, Byron Maxwell, Jalston Fowler, Frank Clark, D.J. Alexander, J.R. Sweezy, Amara Darboh, Nazair Jones, Shamar Stephen, Doug Baldwin, Ed Dickson (NFI), Dion Jordan (PUP).