The Ravens’ salary cap math is a bit scary at this point, no doubt about it. Ten veterans are already on the books to earn at least $4 million apiece in 2013 and a combined $69 million, which is well over half of the expected cap threshold of roughly $121 million. And that list of high earners doesn’t include Joe Flacco, who is going to cash in big one way or another, and also the team’s other restricted and unrestricted free agents, which includes Ed Reed. Whew. Some tough decisions lie ahead. No one wants any players to depart after a Super Bowl-winning season, but it is the Ravens’ job to continue to turn the roster over on the run, juggle age and youth, high earners and low earners. That’s how you compete year after year.