At this point of the off-season, there aren’t many positions where you can use the word “additions” in reference to the Ravens. But defensive line is that one spot. The additions — see, there’s that word — of Chris Canty and Marcus Spears are expected to have an impact not just for what they can bring to the line, but also for what they mean for Haloti Ngata. “We’ve played [Ngata] everywhere pretty much, and it’s been more based on what we’ve needed to do based on the offensive line that we’re going against or our situation personnel-wise,” coach John Harbaugh said this week, as reported in The Carroll County Times. “But the fact that we’ve added two guys that can play defensive end definitely marks the possibility he could play inside more.”