John Michael Gyllenborg signs with Chiefs as undrafted free agent

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John Michael Gyllenborg signs with Chiefs as undrafted free agent 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.