Let's rewind it back to just a few weeks ago when starting right tackle Jeff Allen went down with an elbow injury, ending his season.

Allen, the team's starting left guard for the last two years, was only playing right tackle because of the suspension to Donald Stephenson, who had to miss the first four games of the season.

The team subsequently signed free agent veteran Mike McGlynn right before the final preseason game against the Green Bay Packers. McGlynn, who had spent time with Chiefs coach Andy Reid in Philadelphia, immediately became the starting left guard as Allen moved out to right tackle.

Allen goes down with an injury and veteran Ryan Harris steps in to take that spot.  Harris took over at right tackle playing next to sixth-round rookie pick Zach Fulton, who became the first sixth or seventh round rookie to start the Chiefs season opener in more than 30 years.

On the left side was the Chiefs 2013 No. 1 pick Eric Fisher, who struggled much of his rookie year with injuries and a new position on the right side.

All of that combined set up an offensive line with zero continuity heading into the season and not a lot of time to get it all together.

Chiefs offensive coordinator Doug Pederson spoke a few weeks ago about how this group would go about improving.

"It comes with time and it comes with reps, the more reps they get in practice the better off they're going to be," offensive coordinator Doug Pederson said. "It's going to become a cohesive group as we go.

"We saw it last year from the beginning of the season to the end of the season, kind of in that same situation right now. The more time they spend together, they will get better and they will gel."

What coach Pederson said has happened, the more time these guys have spent together the better they are playing.

The Chiefs went up against one of the most physical front sevens in the NFL on Sunday and found some success in the trenches.

The San Francisco 49ers defense was only allowing 69.8 rushing yards per game before Sunday's game against the Chiefs, which came out to a 3.5 yards per rush average.

The Chiefs offensive line was able to lead a rushing attack that averaged 4.7 yards per rush against the 49ers.

Coming into the game, the Chiefs offensive line had given up 13 sacks through the first four games. On Sunday, the offensive line didn't surrender a single sack.

"We still have room to improve," Reid said on Monday morning. "So I'm saying that with this, but they've done some nice things with players that have plenty of room to improve. They're playing as a unit. They're taking pride in their job."

The final piece of that offensive line is center Rodney Hudson, who has helped lead the development of this group.

"Rodney-- he's in charge of that group," Reid explained. "He takes a lot of pride in that. He's a steady force in that group. He's playing good football. I'm saying all these things telling you that we can get and will get better but he's doing a nice job."

Reid said several times that there are things that need to be improved and heading into the bye week with a 2-3 record further solidifies that.

But when thinking about the trajectory of this offense for the final 11 games of the regular season, there's reason to believe the Chiefs offense will only continue to get better—led by the development of the offensive line.