SCOTTSDALE, Ariz. — The Rockies officially opened camp Wednesday with a spring in their step and confident they’ll be true contenders.

Not everyone, however, is quite so bullish on the Rockies.

Baseball Prospectus and Fangraphs, two respected baseball web sites that lean heavily on analytics, peg the Rockies as a so-so team. Baseball Prospectus, using its PECOTA projections system, predicts that Colorado will finish 78-84 and fourth in the National League West. Fangraphs has the Rockies going 80-82.

So what do the Rockies say? After all, they finished 87-75 last season and qualified for the postseason for the first time in eight years.

“We know we are in a very good spot, and we knew we were last year, too,” said right-hander Jon Gray, the likely No. 1 starter. “But this year is a little different. We know what to do, we know what to expect from ourselves.

“Last year was pretty successful, but there were a lot of bumps in the road. So I think there is nowhere to go but up.  If everybody plays their role, there is nowhere to go but up.”

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Catcher Tony Wolters dismissed the mid-February predictions.

“I honestly haven’t thought about how many games we can win, I just think about us getting back to the playoffs,” Wolter said. “I just know that I want to dye my hair purple in the playoffs along with (Gerardo) Parra.”

Manager Bud Black said his club will keep its predictions “in house,” but added, “You will see some prognosticators that don’t think we are a contending team, but I think you will also find those people that think we are. But ultimately it doesn’t matter. What matters is what we do on the field come the first day of the season. Which is how it should be.”

Arizona humidor. The Diamondbacks are set to unveil a humidor at Chase Field this season, general manager Mike Hazen announced this week. The D-backs will become the second team to install a humidor, following the Rockies, who had one installed at Coors Field in 2002.

According to Park Factor date from ESPN.com, Chase Field had the third-best run-scoring environment in the majors last season, behind Coors Field and Globe Life Park in Arlington, Texas, home of the Rangers.

At 1,059 feet above sea level, and with the hot, dry desert air, Chase is a very offense-friendly ballpark. But Rockies catcher Chris Iannetta, who played for the D-backs last season, isn’t sure a humidor is needed in Arizona.

“I guess it depends on what you want,” he said. “We pitched really well there last year, and we hit well, too. It is a great place to hit, with the big gaps in the outfield, like Coors. But I don’t know if it’s needed.”