The Washington Post’s LaVar Arrington discusses his personal relationship with Ravens middle linebacker Ray Lewis following Patriots wide receiver Wes Welker’s wife’s disparaging Facebook comments about the future hall of fame linebacker after the Ravens’ 28-13 victory over New England in the AFC Championship game. (The Washington Post)

The story of the Baltimore Ravens’ remarkable turnaround from losing four of five games to close the regular season to winning three straight to get to the Super Bowl will be told many times before Feb. 3. And the story will undoubtedly start when the team hit rock bottom.

It was Dec. 16 when the Ravens were booed by their home fans during an embarrassing 34-17 loss to the Denver Broncos. After the game, veteran safety Ed Reed, whose frustration boiled over on the sideline when he threw and then kicked his helmet following a Broncos’ touchdown, stood in front of his locker and apologized.

“As a single player, as an individual, right now I am embarrassed to come out and perform the way we have,” Reed said. “We’re not the only team that lost today and we still have two more games. But as a player, I am embarrassed for our city.”

A little more than a month later, that embarrassment has turned into a city-wide celebration. The Ravens rebounded from the Broncos’ loss to beat the New York Giants the following week, setting the stage for the postseason run that has the Ravens readying for a matchup with the San Francisco 49ers in Super Bowl XLVII on the first Sunday in February at the Superdome in New Orleans.

How did the Ravens turn things around in time? Their postseason run can be traced back to four decisions made over the past six weeks.

●Dec. 10: Ravens fire offensive coordinator Cam Cameron and replace him with quarterbacks coach Jim Caldwell.

The timing of Cameron’s dismissal seemed odd. A day earlier, the Ravens endured a 31-28 loss in overtime to the Redskins, but the defeat couldn’t be pinned on the offense. Joe Flacco threw three first-half touchdowns and completed 16 of 21 passes, Ray Rice rushed for 121 yards and a touchdown and the offense put together a clutch touchdown drive to take an eight-point lead with less than five minutes to go.

It was the defense that faltered, allowing Redskins quarterback Robert Griffin III and then his backup Kirk Cousins to drive the length of the field in the final minutes for the game-tying score and two-point conversion. However, the next day it was Cameron who was out of a job.

“It’s what I believe is best going forward for our offense and for our football team,” Ravens Coach John Harbaugh said at the time.

The reality was that the decision was based on more than just one game and any sideline disagreement between Cameron and Harbaugh — and television cameras clearly showed one such moment — just accelerated the move.

Flacco has only one interception in six games since Caldwell has taken over play-calling duties and that was in the first half of Caldwell’s first game in his new role. In three playoff games, the Ravens have totaled 90 points and averaged 425 yards of total offense.

●Jan. 2: Middle linebacker Ray Lewis tells his teammates and then the media that he’s retiring at the end of the season.

Lewis, a future Hall of Famer and the longtime face of the franchise, said that he made the decision when he was home in Florida rehabbing his surgically repaired torn right triceps. He opted to let his teammates in on it four days before the Ravens’ playoff opener against the Indianapolis Colts.

Lewis’s announcement first stunned and then inspired many of his teammates who openly talked about wanting to send their leader off by helping him get to the Super Bowl.

“We all just put our pride aside, and if we are going to ride it, we are going to ride it,” said Rice, Lewis’s closest friend on the team.

●Jan. 6: Ravens unveil new-look offensive line in playoff opener versus the Colts.

We may never know whether Harbaugh would have juggled the Ravens’ offensive line had left guard Jah Reid not injured his toe in the regular-season finale against the Cincinnati Bengals but that’s probably not important now.

What matters is that the current group with Bryant McKinnie at left tackle, rookie Kelechi Osemele at left guard, Matt Birk at center, Pro Bowler Marshal Yanda at right guard and Michael Oher at right tackle has been dominant in the Ravens’ playoff run.

●Jan. 20: Trailing the New England Patriots 13-7 at halftime of the AFC championship game, the Ravens put the game in Flacco’s hands.

The Ravens waited a year to avenge last season’s AFC championship game loss to the Patriots so the last thing they wanted to do was go down passively. That was the message in the visiting locker room at halftime after the offense looked especially sluggish for the first 30 minutes.

“In the first half, we were probably a little bit run-heavy and they did a good job of stopping it,” Flacco said. “We didn’t come all the way here to play it safe and hope to win. We came here to win the AFC championship game.”

Flacco was 6 of 12 for 81 yards in the first half as the Ravens accumulated just 130 yards of offense. All he did in the second half was go 15 of 24 for 159 yards and three touchdowns.

The Ravens’ three second-half scoring drives lasted 24 total plays and Flacco, operating in a shotgun and out of the no-huddle, threw on 18 of them and scrambled for a first down on another.

The Ravens returned to a run-heavy attack late in the fourth quarter when they had a two-score lead and they were running out the clock. By then, their trip to New Orleans for the Super Bowl was well in their grasp.