As the Denver Broncos gear up for their preseason opener against the Colts, the focus goes beyond the star players. Every year, a few under-the-radar players emerge as standout performers, going from roster bubble to integral team contributors. With rookies and unheralded players vying for attention, let's take a look at seven individuals who could make a significant impact in the Broncos' first preseason game.

1. Thomas Incoom - Edge Rusher:
Undrafted free agent Thomas Incoom impressed last season, earning a roster spot as a rookie. While he may have been inactive for most games, Incoom showcased his potential in four appearances. Heading into his second season, he has been causing havoc in Broncos' training camp, consistently notching at least one sack per practice. With key players like Baron Browning and Jonathon Cooper expected to see limited playing time, Incoom will have a golden opportunity to prove his worth in the Broncos' pass rush.

2. Matt Peart and Alex Palczewski - Offensive Tackles:
With Quinn Bailey's unfortunate season-ending injury, the spotlight is now on Matt Peart and Alex Palczewski to step up as swing tackles. Palczewski, an undrafted free agent from last year, shows promise with his intelligence and extensive experience. Head coach Sean Payton believes Palczewski will shine once the pads come on. Peart, a former third-round selection by the Giants, has struggled in his NFL career, making this preseason game crucial for him to prove his worth protecting the Broncos' quarterbacks' blindside.

3. Levelle Bailey - Linebacker:
Undrafted rookie linebacker Levelle Bailey caught the attention of the Broncos and head coach Sean Payton, who personally recruited him after the draft. Bailey has a chance to secure a place on the Broncos' 53-man roster by making a strong impression during the preseason. Payton highlighted the importance of Bailey's performance on special teams and his tackling ability. Bailey, despite being a smaller linebacker, needs to showcase his ability to shed blocks and make plays in coverage to solidify his role with the team.

4. Reese Taylor - Slot Corner:
Cornerback Reese Taylor, an undrafted player from last year, has consistently impressed during training camp. With solid coverage skills and positive mentions in drills, Taylor is pushing for a roster spot after spending time with the Chiefs and the Broncos' practice squad. As the backup slot corner behind Ja'Quan McMillian, Taylor will have ample playing time against the Colts to continue proving his worth. As key roles in the Broncos secondary remain open, Taylor's contributions on special teams could further boost his chances of earning a spot.

5. JL Skinner and Devon Key - Safeties:
Due to injuries and roster moves, the Broncos' safety depth has been stretched thin. This opens the door for players like JL Skinner and Devon Key to step up. On the radar of head coach Sean Payton, Skinner has shown progress and improvement throughout camp. The preseason will serve as a valuable opportunity for him to continue his development. Key, on the other hand, hopes to follow the path of P.J. Locke, transitioning from a practice squad member to a starter. Both players are bound to receive significant playing time and have the chance to solidify their roles on the team.

As the Broncos prepare to kick off their preseason against the Colts, keep an eye on these under-the-radar players who could make a significant impact. With opportunities to showcase their skills and stake a claim for roster spots, their performances in this crucial game will surely have lasting implications for their NFL careers.