Ravens coach John Harbaugh opened his media availability by offering his condolences to the victims of Monday's suicide bombing in Manchester, England, after a concert by singer Ariana Grande. Harbaugh has a high school-age daughter and said the attack "really hits home for us." He added: "I just want to speak out about that and just make sure that we all keep that in our hearts." ... With Pro Bowl selection Kyle Juszczyk having signed with the San Francisco 49ers, Harbaugh said he remains philosophically flexible with how the offense could use, or not use, a fullback. "That position can be filled by football players, so whether you call a guy fullback, you call him a tight end, whether you call him a wide receiver getting in there and doing some things, you know, if we have a fullback who's one of the best 53 who plays the fullback in terms of the roster spot, we'll do it that way," he said. ... Harbaugh is happy to have more relaxed celebration rules, but he said there's also an expectation for decency: "We're a PG league in terms of what the fans should see. You should be able to take your 8-year-old to the game or watch it on TV and feel really good about what you see."