Clyde Edwards-Helaire leads the NFL in rushing after the first week of the season, but the Kansas City Chiefs have some concerns about their rookie running back.

The first-rounder gained negative-2 yards in six carries in goal-to-go situation in Week 1's win over the Houston Texans.

"The bottom line is, if you follow all the keys we're coached up to do in our room, he scores," running backs coach Deland McCullough said. "Some of the things we're talking about right now would be a moot point. But again, as he continues to grow -- he took big growth after the last game and he'll take another big step in this game -- regardless of what the plan is, when we are down there, the running back's job is to score. And when we do everything we're coached to do, we'll score a touchdown."

McCullough suggested Edwards-Helaire would remain as the goal-line back in Sunday's game against the Chargers in Los Angeles.