The proclamation was firm, unwavering. In 2013, Mike McCarthy says, the Green Bay Packers will run the ball better.

Speaking during the final day of organized team activities open to the media two weeks ago, the Packers coach didn’t set any tangible goals or milestones for next season, but he didn’t mince words, either.

In short, he’s not willing to accept anything less than improvement from a rushing offense that ranked 20th in the NFL last season.

“Expectations for the run game, (I) don’t have a number for you. To me, that will sort itself out in training camp,” McCarthy said. “We have to get in pads to find out what’s real and what’s perception.

“We’ll be better, I promise you that. Big letters.”

For the past three years, the Packers’ running game has taken the form of a sputtering cloud of dust, serving as the occasional complement to Aaron Rodgers and an offensive scheme driven through the air.

The proof lies in the Packers’ successes, but their streak of 43 consecutive regular-season games without a 100-yard individual rusher also is unavoidable. The last time it occurred, on Oct. 10, 2010, Brandon Jackson needed a 71-yard run in a 16-13 overtime loss to Washington to finish with a 115-yard day.

A sign of the times in today’s NFL? Possibly. The way running backs are paired in two- or three-man rotations doesn’t lend itself to individual accolades, but that the Packers have failed to break a 50-yard run in each of the past two seasons remains a concern.

This past season, the Packers struggled even to keep the same group on the field on a weekly basis as they churned through James Starks (turf toe, bone bruise), Cedric Benson (Lisfranc foot sprain) and Alex Green (coming off knee surgery) in the opening weeks of a 2-3 start.

Eventually, they dusted off a 30-year-old Ryan Grant and promoted DuJuan Harris from the practice squad late in the season to patch together a run game that averaged 106.4 yards per game in 2012.

While the Packers under McCarthy never have been the worst team in the league in terms of running the ball — peaking at 14th in 2009 and plummeting to 27th in 2011 — they’re the only team in the league since 2010 that hasn’t finished at least one season with more than a 4.0-yards-per-carry average as a team.