Mabry was signed to the Seahawks' active roster from the practice squad Wednesday, John Boyle of the team's official site reports.
Mabry was elevated from the practice squad ahead of Sunday's game against the Jets, and he ended up reeling in the first catch of his NFL career, a seven-yard touchdown in the second quarter. The 26-year-old once again will provide an additional depth option behind Noah Fant at tight end in Week 18 with Will Dissly (knee) unavailable for the final contest of the regular season. If Seattle is able to sneak into the postseason, Mabry could find himself a part of the active roster past this weekend.