Dissly injured his heel in Sunday's 51-29 win over the Lions, John Boyle of the Seahawks' official site reports.
"(Dissly) banged his heel," coach Pete Carroll said. "He's got a heel bruise or something. I'm not sure what it is right now." The backup tight end had one catch for eight yards before getting hurt. Dissly's status for the team's Week 18 trip to Arizona is up in the air.