BALTIMORE (WJZ) — The Ravens announced they will send tight end Maxx Williams to the injured reserve list.

Williams suffered a knee injury in Sunday’s Week 4 loss to the Raiders and it looks like he made need to have surgery. Harbaugh said, “It’s a cartilage issue that he has in there. It’s not something that can be fixed until it’s fixed.”

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The Ravens already brought up tight end Daniel Brown earlier this week and Darren Waller is finished serving his four-game suspension.

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Waller returned to the practice field earlier this week for the first time in about a month, joining his teammates and coaches following a suspension for violating the NFL’s substance abuse policy.