The Arizona Cardinals placed rookie tight end Troy Niklas on injured reserve.
He has a sprained ankle.
Niklas was replaced on the roster with veteran tight end Matthew Mulligan.
Mulligan has 16 career receptions and is a strong blocker.
Mulligan has previous stints with the Chicago Bears, New England Patriots, St. Louis Rams and New York Jets.
Niklas broke his finger during the offseason.
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Aaron Wilson covers the Ravens for The Baltimore S un