SANTA CLARA, Calif. – The statistics in the Broncos’ running game last season were downright ugly.

Since-departed Javonte Williams was their top rusher with a meager 513 yards, the second-lowest total by a Broncos leader over the past 42 seasons. They had one gain all season by a running back longer than 21 yards and that came late in a game in a rout against reserves.

But help has arrived and it will be on display Saturday night when Denver faces San Francisco in the preseason opener at Levi’s Stadium. The Broncos signed free agent J.K. Dobbins and selected RJ Harvey in the second round of the draft. Dobbins is the projected starter and Denver coach Sean Payton has said starters will see some action against the 49ers.

“Really excited,’’ quarterback Bo Nix said when asked about seeing t

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