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Tremble (back) ran routes on the side during training camp Friday, David Newton of ESPN.com reports.

Tremble underwent back surgery in May and opened camp on the active/PUP list. The fifth-year tight end has been increasing his workload and "appears to be trending in a good direction," per Newton. It remains unclear, however, if Tremble will be ready to play in Week 1 of the regular season.

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