In a bit of a surprise, the San Francisco 49ers placed tight end Garrett Celek on the Active/Physically Unable to Perform List to start 2014 training camp. Celek was a participant in the offseason workout program, and this would seem to indicate some kind of injury during that program. Had he injured himself away from the 49ers, the team could have placed him on the NFI list. As always, check out socalisteph's full rundown of PUP and NFI rules.
Celek joins NaVorro Bowman, Aaron Lynch, and Kaleb Ramsey on the PUP list. Bowman is rehabbing the knee he tore up in the NFC Championship Game. Lynch suffered a hamstring strain during OTAs. There is no word yet on what Ramsey's injury is, although given his injury history in college, this is not really surprising.
The team did not announce the injury that led to this, so we can't know how serious this is. It's serious enough that Celek can't practice yet, which potentially opens the door for Derek Carrier. The 49ers signed Carrier last year when Celek missed three weeks with a hamstring strain. Carrier stuck around when Celek returned in Week 14, but did not contribute much the rest of the way. Asante Cleveland and Kevin Greene also benefit if Celek misses any extended time, but Carrier would seemingly be the favorite to handle the No. 3 tight end work should Celek miss significant time. We'll keep on eye on this moving forward.