The Jaguars activated Armstead (knee) from the active/PUP list Tuesday.
Armstead has passed his physical and is ready to participate in practice for the first time this training camp. The 6-foot-7 defensive tackle missed the start of camp while recovering from offseason surgery to repair a torn meniscus. The 30-year-old defensive tackle inked a three-year, $51 million contract with Jacksonville in March and will now anchor his new team's interior D-line.