The San Francisco 49ers' rebuilt offensive line, with only one starter remaining at the same position he played at in the 2014 opener (paging left tackle Joe Staley), was a concern entering this season.
But in the Niners' dominant season-opening 20-3 victory over the Minnesota Vikings, the O-line was a strength in springing Carlos Hyde for 168 yards rushing.
Less than a week later, though, those preseason concerns and, well, warts came to the forefront in a 43-18 blowout loss at the Pittsburgh Steelers.
"Up and down," said Niners coach Jim Tomsula on Monday, when asked to describe the play of his O-line.
"There was obviously a couple of plays there that we wished we could have protected a touch longer. But, there were also some really good things. That group there's steadily moving."
Pro Football Focus, though, saw things a little differently. Especially for the right side of the line against the Steelers. Remember, Colin Kaepernick was sacked five times.
Consider: center Marcus Martin was given a grade of minus-2.1.
Right guard Jordan Devey, acquired in a trade with the New England Patriots on Aug. 18, had a grade of minus-3.4, with minus-3.8 on pass blocking by giving up a sack and six hurries.
And veteran right tackle Erik Pears was slapped with a grade of minus-6.4.
The season may only be two games old for the Niners, but after Sunday's games, Pears ranked 64th out of 70 tackles in the league with grade of minus-8.7, while Devey (minus-5.8) was 65th of 71 guards and Martin (minus-4.5) was 27th of 32 centers.
Also, as a whole, the 49ers offensive line has a Pass Blocking Efficiency rating of 66.3, last in the NFL, per PFF.
Up and down? It would appear there's only one way for the right side of the O-line to go.