CONCORD, N.C. (AP) -- Reigning Nextel Cup champion Kurt Busch told Roush Racing he has signed with another racing team for 2007 and has asked to be released from his 2006 contract, Roush said Tuesday. It was not immediately clear which team Busch signed with, although Penske, Joe Gibbs Racing and Dale Earnhardt Inc. all have cars coming open next season. Roush said the team will wait for ``an indefinite period'' before making a decision on Busch's request to leave after this season. In a statement announcing Busch's departure, Roush said it would have no additional comment on the split....