Denver Broncos RB Battle 2025: J.K. Dobbins vs. RJ Harvey for Week 1 Starter & Marvin Mims Jr.’s Impact on the Offense

The Denver Broncos’ backfield competition is heating up as J.K. Dobbins and rookie RJ Harvey battle for the Week 1 starting role. Harvey’s explosive playmaking ability has turned heads in camp, challenging Dobbins’ early lead as RB1.

Meanwhile, Marvin Mims Jr. has secured a starting receiver spot, adding a dynamic element to Denver’s passing game. His development could significantly impact how defenses approach the Broncos’ run-heavy offense, potentially creating more opportunities for both backs.

With training camp in full swing, Denver’s revamped offense faces high expectations as they prepare for the 2025 season.

Denver Broncos RB Battle 2025: J.K. Dobbins vs. RJ Harvey for Week 1 Starter

The Denver Broncos’ backfield drama is heating up as veterans J.K. Dobbins and rookie RJ Harvey engage in one of the most intense training camp competitions. Dobbins, the former Ravens RB arriving on a prove-it deal, entered camp with first-team reps, but Harvey’s electrifying college tape and second-round draft capital suggest this battle could flip by September. NFL Network’s James Palmer noted Dobbins looked “noticeably explosive” in early practices, but Harvey’s dual-threat capabilities perfectly fit Sean Payton’s offense.

Here’s why this competition matters:

• Dobbins averages 5.8 career YPC but has missed 27 games since 2021
• Harvey posted 1,581 scrimmage yards at UCF with 16 touchdowns in 2024
• Broncos ranked 28th in rushing yards last season (1,578 total)

Mr. Owl: “History shows Payton prefers veteran RBs early (see: Mark Ingram with Saints), but Harvey’s special teams value might force a timeshare by October.”

Critical Factors in the Position Battle

• Blitz Pickup: Dobbins graded at 78.3 in pass pro per PFF vs Harvey’s unknown NFL readiness
• Red Zone Efficiency: Dobbins converted 68% of goal-line carries in Baltimore
• Scheme Fit: Harvey’s 4.38 speed vs Dobbins’ downhill style creates fascinating tactical options

Marvin Mims Jr.’s Emergence Could Reshape Broncos Offense

While the RB battle dominates headlines, Marvin Mims Jr.’s ascent to WR2 opposite Courtland Sutton adds a new dimension to Denver’s attack. The 2023 third-rounder showed flashes last season with a 17.1-yard average per catch, and Payton reportedly redesigned entire red zone packages to leverage his 39-inch vertical.

The Oklahoma product’s development directly impacts the backfield:

• With Mims deep threat capability, defenses must respect play-action
• His 84.3% contested catch rate in 2024 would rank top-10 among WRs
• DC’s predict Sutton/Mims could force 8-man boxes on just 18% of snaps (vs 31% in 2024)

Mr. Owl: “Mims reminds me of a young Emmanuel Sanders – his ability to high-point balls makes Bo Nix’s life exponentially easier on third-and-long.”

Broncos’ 2025 Depth Chart Projections and Camp Surprises

Beyond the headline competitions, Denver’s roster features several intriguing subplots:

Sean Payton’s Strategic Dilemma: Rookie Potential vs Veteran Stability

The coaching staff faces complex decisions in managing their backfield resources. While Dobbins offers proven production (3.2 yards after contact per attempt in 2024), Harvey presents the higher ceiling with three 50+ yard touchdowns in his final college season. Payton’s historical tendencies reveal fascinating patterns:

• Veterans started Week 1 in 12/15 seasons as Saints HC
• Rookie RBs averaged just 112 carries under Payton in New Orleans
• However, Alvin Kamara’s 2017 breakout shows his willingness to adapt

Mr. Owl: “This feels like Deuce McAllister vs Reggie Bush circa 2006 – the smart money says both backs eclipse 150 touches in Payton’s hybrid system.”

Fantasy Football Implications: Which Broncos to Target?

For fantasy managers evaluating Denver’s skill players:

• Harvey: Ideal target in Round 5 as potential league-winner
• Dobbins: Safe RB3 with touchdown upside in early redraft
• Mims: Priority waiver add if he wins WR2 role outright
• Sutton: Volume makes him a value at current ADP (WR28)

Predicted Stat Projections

Mr. Owl: “Harvey’s 3-down potential makes him my sneaky ‘Zero RB Strategy’ target – expect 50+ catches if he wins passing downs early.”

Broncos’ Path to Playoff Contention: Key Factors

Denver’s postseason hopes hinge on three critical elements:

1. Run Game Efficiency: Must climb from bottom-5 to top-12 in rushing
2. Nix’s Development: Needs 25+ TD passes to balance offense
3. Secondary Health: Surtain/Simmons combo requires 30+ starts collectively

The AFC West features formidable opponents, but Denver’s upgraded trenches and backfield versatility could produce 3-4 more wins than last season’s 7-10 record. If Harvey emerges as expected and Mims delivers on his potential, this offense could surprise skeptics.