MTVN is bidding good-bye to HR chief JoAnne Adams Griffith, who will leave the company after 21 years to pursue an independent consulting practice. Catherine Houser was elevated to the role of evp, HR, reporting to Judy McGrath. — Comcast SportsNet appointed Ray Warren evp/chief revenue officer, a new position responsible for maximizing national and local ad rev. Also, the net group promoted John Ruth to evp, finance, planning and business operations, and Russ Chandler to svp, business development. — Oxygen Media appointed Cynthia Chu vp/CFO. — Outdoor Channel appointed Michael Kim vp, affil sales.