Well considering Angel W. first joined the team in 2007(!), I would consider her tenure to be quite impressive!
Also, she is not the only one from the 2007-2008 squad that is still on the team, as Jaime A. has been on-and-off the team since 2005(!), and is currently in her 15th season, which probably makes her the longest tenured NFL cheerleader of all time.
I am curious as to why many cheerleaders from the Ravens squad tend to be on the team for so many years. Would be certainly hard to imagine for a DCC!