For better or worse, you've seen all you're going to see of the Eagles' first team offense before the Sept. 10 season opener at Washington.

Was it enough to settle most qualms? Not for fans who booed Thursday night when backup quarterback Matt McGloin ran onto the field for the first drive of the second quarter.

In a 38-31 victory over the Miami Dolphins, after three days of joint practices, some stuff looked better than in the previous two preseason games. Some stuff looked worse. While it might have been stupid to further expose Carson Wentz to injury, his herky-jerky offensive line, hailed in the offseason as one of the league's best, definitely looked like it needed more than a quarter of work.

The starting unit finally ran the ball effectively. Wendell Smallwood, free of the hamstring injury that kept him out of the first two preseason games, hit the holes crisply — four Smallwood carries for 28 yards in the first quarter. LeGarrette Blount managed 18 yards on three carries, albeit 16 of them on one rumbling, rambling  jaunt.

[Offense looks sharper, starters make an early exit]

So that's seven carries for 48 yards while the first team was in, for a group that entered the evening having managed  just 115 yards on 45 preseason carries.

"My injury, I don't think it held me back at all today," said Smallwood, who confessed to pregame "jitterbugs."

"We wanted to show this run game and get that athletic line running They came out firing, they had some holes for us, and we took it from there," Smallwood said. "I kind of put pressure on myself a lot of times, but today was just to go out there and have fun."

Offensive line coach Jeff Stoutland said recently that he wasn't worried about run game results so much in preseason, that he had his guys working on the finer points. That work seemed to pay off.

This showing might have been crucial for Smallwood, a fifth-round pick in 2016 who is starting to get a reputation for being fragile. Running backs coach Duce Staley made it clear recently that he really likes Smallwood, said Smallwood was having the best camp of any of the backs before he got hurt, but Staley also said: "I always tell him, 'You remind me of a small car with a big motor; you're always overheating, something's always going on.' "

Thursday's bigger issue was that even in limited work, Wentz was getting hit early and often. Having the five projected o-line starters together for the first time all preseason yielded few benefits. According to Pro Football Focus, Wentz was under pressure on 60 percent of his dropbacks. He was sacked once, threw two balls away, and was intercepted when the pocket collapsed and journeyman defensive end William Hayes batted a pass to defensive tackle Jordan Phillips.

On the sack, Smallwood was bulldozed trying to pick up a blitzer, causing Wentz to have to move, into the path of Andre Branch, who had twisted inside, rampaging untouched past center Jason Kelce.

[Sielski: By their own measure, Eagles have to rate this preseason a success]

But the Eagles also showed a big-play capability they lacked last season, on Torrey Smith's 50-yard touchdown catch, and then Wentz later authored a 93-yard drive that ended with a TD pass to Alshon Jeffery.

"This was the first time the whole offensive line has really played together in a preseason game. That's one thing," right tackle Lane Johnson said. "Our goal was to run the ball tonight. We executed that. Got to do a better job of protecting Carson."

Johnson created a stir with a piece he authored for the Players' Tribune, in which he vowed that the Eagles would "whup some [butt]" in the Washington opener. Redskins linebacker Zach Brown replied that his team doesn't need PEDs to win — a reference to Johnson's two NFL suspensions.

"It's all in good fun. I'm a competitive person," Johnson said. "That's the mentality here. Who wants to be soft with a division opponent? Has that ever been the mentality here? No. Nobody likes the Cowboys. Nobody likes the Redskins. I really don't give a damn" about Washington's reaction. "There you have it."

Generally you play your starters at least through the first half in the third preseason game, since they won't play at all in next Thursday's finale at the Jets.  But when the Eagles got the ball 12 seconds into the second quarter, in came McGloin and the second team offensive line. Eagles coach Doug Pederson said he felt the starters got in good work this week, practicing against the Dolphins, so he felt he could lift them early.

"Yeah, to be honest," right guard Brandon Brooks said, when asked if he was surprised to leave after a quarter.

Kelce said he felt the effort Thursday was "a little bit sloppy," but he said he feels the offense is ready for the opener.

"Yeah, I do. obviously I would have liked to have gotten the running game going a little bit better this preseason; I think everyone can say the same thing," Kelce sad. "But I think we got a lot of great work this week with the Miami Dolphins. We've seen a lot of things from different defenses. Right now, with where our offensive line is, and our offense in general, I'm really excited. I think we have a lot of good pieces. You saw today, some of those big plays — those are huge momentum shifters that we kind of lacked last year. I really think that we have a great offensive unit here."

Wentz said he was to blame for some of the hits he took — he felt he could have gotten the ball out quicker.

It might be worth noting that Halapoulivaati Vaitai, the second-year offensive tackle the Eagles are expecting to be the first OT off the bench, committed three penalties in a four-play span in the second quarter. The team traded away veteran swing tackles Allen Barbre and Matt Tobin, showing faith in Vaitai, a fifth-round draft pick last year.