One of many S.G.C. units deployed out of Cheyenne Mountain.
Members of SG-14 include (or have included):
Show and Tell - SG units 5 and 14 are on missions when the Re'tu-human, Charlie, arrives at Stargate Command.
Divide and Conquer - Two members of SG-14 are revealed to have been captured by the Goa'uld and turned into za'tarcs.