A former basketball player who didn't pick up a football until his senior year of high school, Gyllenborg is one of the most fascinating developmental bets in this class — a 6-foot-6 vertical seam-stretcher with legitimate sub-4.65 speed who can stack defenders and run away from linebackers at the second level. When he's detached from the formation and working the slot or flexed wide, he's a mismatch weapon who creates easy windows on over routes and seam concepts. But the tape tells two stories: the receiving upside is tantalizing, while the blocking is a genuine liability — lacking play strength, leverage, and consistent tenacity at the point of attack. He's also coming off an injury-plagued senior year (hamstring) that suppressed his production to just 217 yards, and the route tree is still narrow and technically inconsistent. Gyllenborg's ceiling is a creative offensive coordinator's chess piece who changes how defenses play 12 personnel; his floor is a roster-bubble TE4 who can't stay on the field on early downs.
- Explosive vertical threat at tight end — legitimate 4.60 speed at 249 pounds with a 10-foot-8 broad jump creates genuine downfield separation against linebackers and most safeties
- Fluid mover with smooth hips and quick footwork for his size — basketball background evident in his ability to sink, cut, and change direction at speed
- Natural hands catcher who tracks the ball well downfield and shows high-point ability at the catch point
- Creates separation by attacking soft spots in zone coverage and manipulating leverage against man defenders at the stem
- Special teams experience across multiple units (kick return, kick coverage, punt coverage, field goal) provides an immediate path to active roster on game day
- In-line blocking is a significant liability — severely lacks play strength and punch, gets pushed back off the line, and loses the leverage battle due to his height
- Route tree is narrow and technically inconsistent — rounds his breaks, absorbs too much contact early in routes, and lacks the hand usage to clear jams
- Struggles catching through contact despite decent natural hands — below-average catch radius relative to his frame
- Injury history is a real concern — hamstring issues limited him in both 2024 and 2025, suppressing what should have been his best production years
Similar athletic profile as a tall, fast move tight end who wins with speed and vertical ability rather than power or blocking. Like Herndon, the receiving tools are enticing but blocking deficiencies and inconsistent production cap the projection. If the hands and health come together, there's a path to a productive receiving role; if not, he's a roster fringe player.