He is listed as a F on nba.com, but on espn.com he is listed as the starting shooting guard on the Sonics depth chart and as a GF on the Sonics team page.

Sonics roster:
http://sports.espn.go.com/nba/teams/roster?team=sea
Sonics depth chart:
http://sports.espn.go.com/nba/teams/depth?team=sea