Ronnie Hillman

Ronnie Hillman is still listed as the No. 3 running back on the depth chart issued by the Broncos in their weekly press release Monday.

But he was the second running back up against Houston on Saturday. And after slashing through blocks and around the edges of the Texans' defense for 54 yards on just eight first-half carries, he is second to none in the league in rushing yardage so far this preseason, with 120 yards on 16 carries.

Yeah, yeah, it's just preseason. The Broncos know that. Hillman, in his fourth year, knows that. Last year's preseason rushing leader, Baltimore's Lorenzo Taliaferro, gained just 292 yards in limited duty in the regular season. No one's breaking out the streamers and balloons to herald Hillman's arrival.

But there's something different about the San Diego State product now. As the offense as a whole searches for consistency in a tweaked scheme, Hillman appears more comfortable now than ever before.

"He’s moved himself up. He’s had a really good camp," Head Coach Gary Kubiak said after Saturday's game. "... He deserves more reps and if he keeps playing like that he’ll continue to get some more."

Kubiak has always noted that he won't strictly have No. 1 and No. 2 running backs; instead, they will be 1 and 1a. The best example of how that worked for him came in the 2011 season with the Houston Texans, when backup Ben Tate had 175 carries -- 62.9 percent as many as first-teamer Arian Foster. They combined for 2,166 yards and the Texans sprinted to their first division title. The No. 2 back will play -- and he could see a lot of work, the story said. Right now, C.J. Anderson figures to be the lead back with Montee Ball also a factor. But Hillman has been good and the Broncos appear to have three legit threats. While Anderson is a popular early round pick after stepping up late last season, it looks like at least Hillman is trying to make a push for playing time.