49ers placed TE Garrett Celek on injured reserve with a back injury, ending his season.
TE Daniel Helm has been promoted from the practice squad in a corresponding roster move. Levine Toilolo will assume Celek’s blocking role. Celek had yet to catch a pass in five games since being activated from the PUP list in early November. That injury was also to his back. Back woes are an unideal development for a 31-year-old tight end. Celek, who has been in San Francisco since 2012, is in the final year of his contract.