Complex sentence: He played for the Green Bay Packers for 16 years until he was traded to the New York Jets for the 2008 season, but only stayed in New York for a year, before signing with the Vikings on August 18,2009 as their starting quarterback.
Split into simpler sentences: He played for the Green Bay Packers for 16 years before being traded to the New York Jets for the 2008 season. Favre signed with the Vikings on August 18,2009 as their starting quarterback.