Not to be a Ravens apologist, but they are my "home" team. The Ravens offensive numbers speak for themselves.
Ravens offensive rank during Matt Cavanaugh's six years:
1999, 24th, 298.6
2000, 16th, 313.4
2001, 14th, 320.3
2002, 24th, 289.9
2003, 21st, 308.1
2004, 31st, 273.4
Also regarding Fassel, he joined the Ravens to stay involved in the league, but he was not the offensive coordinator. He was strictly brought in as an offensive consultant to work with Boller and provide suggestions for the offense. His contract ended in December.
*just for the record*