John Michael Gyllenborg

Gyllenborg is still a work in progress with a limited playing resume under his belt. In high school, he played only three games in his senior year (after converting from a basketball standout) before losing the rest of the season to an LCL injury. In 2024, he dealt with a high ankle sprain, and in 2025, he missed time with a hamstring injury. Gyllenborg is a solid athlete with a 4.60 40-yard dash, an 87th percentile vertical jump, and a 98th percentile broad jump. He has decent build-up speed. Gyllenborg needs to clean up his catch technique. He finished college with a 9% drop rate, and he looks like he's fighting the ball with many catches. There are also plenty of concentration drops on his film. Gyllenborg needs to continue to refine his footwork and movement skills. He can look lumbering off the line and clunky when getting in and out of his breaks. His hips are also a tad stiff with the inflexibility and lack of explosion showing up with short area routes (whips). Gyllenborg was tasked with a limited route tree as an underneath option in 2025. 60% of his routes were outs, ins, flats, and crossers. 80% of his targets were within nine yards of the line of scrimmage or behind it. He's a zone coverage option and a chain mover at this juncture. He had only 5.4 yards after the catch per reception and six missed tackles forced in college. Gyllenborg doesn't deal well with physical coverage. He can be pushed off his line and bullied at the catch point. He needs to improve his play strength to match his raw athleticism. He finishes college with a 46.7% contested catch rate. Gyllenborg is a raw blocking option. His feet can be a tick slow at times as he adjusts laterally to pass rushers, as they have no problem clearing him with ease. His technique is all over the place. He flashes the strength to sustain blocks at times while getting pushed around easily during other plays. Some of it looks like an effort issue, but there will be a lot of work required in the NFL to get him up to league-average blocking standards. Dynasty Outlook: Gyllenbord went undrafted, but he signed a UDFA deal with the Chiefs. Gyllenborg is a taxi squad option in tight end premium formats only.

TE John Michael Gyllenborg has signed with the Kansas City Chiefs as an undrafted free agent.

Fantasy Impact

Gyllenborg played collegiately at Wyoming where he caught 80 passes for 1,023 yards in 43 games with the Cowboys. He's an athletic tight end with the ability to gain yards after the catch. He'll add depth at tight end for the Chiefs.