Every Friday, I’ll ponder five topics related to the Orioles or Ravens (or a mix of both). Five questions … 1. Is it just me or does the acquisition of Kyle Arrington have you feeling really good about the Ravens in 2015? Baltimore is no stranger to significant roster turnover, but fans were understandably uneasy in seeing so many high-profile players depart this offseason. Since then, general manager Ozzie Newsome has done some of his finest work — on paper, at least — with this year’s draft and Wednesday’s acquisition of veteran cornerback Kyle Arrington, which addressed the last glaring need the Ravens had. Arrington isn’t a Pro Bowl player, but his experience and versatility will be welcomed in a secondary that struggled at cornerback and safety last season. The Ravens may not be the clear favorite in the AFC this season, but they could be very dangerous in December and January if — and it’s a big one — rookies Breshad Perriman and Maxx Williams are ready to contribute in a meaningful way. 2. Is it just me or are the Orioles delaying the inevitable with Hunter Harvey’s latest elbow problems? I couldn’t help but feel a sense of