Garrett Celek heads to IR, as 49ers running short at position

The 49ers are rapidly running out of tight ends. Via Matt Barrows of the Sacramento Bee, the 49ers placed Garrett Celek on injured reserve, as injuries are mounting there. Celek had career highs in receiving yards (186) and touchdowns (three), but hasn’t played since suffering a high-ankle sprain on Nov. 29 against the Cardinals. Fellow…