End zone: The victory was Harbaugh’s 100th as a head coach, and he celebrated it with what he called a nice moment with linebacker Terrell Suggs and Flacco, two of the players who have been Ravens throughout his tenure. … Flacco was under the weather and his voice was barely audible in the postgame news conference, but he said he had few problems getting the plays out to his teammates. … Rookie cornerback Marlon Humphrey kept the ball from his first career interception, but he said afterward that he wasn’t sure what he’d do with it. Humphrey played extensively, mostly in place of Brandon Carr, as the Ravens sought to get more speed on the field to combat the Packers’ receivers. … Collins’ 3-yard touchdown run in the fourth quarter, which he celebrated with an Irish dance, was his first of the season. He received a game ball after the victory. … Ravens middle linebacker C.J. Mosley hobbled off the field with an ankle injury late in the fourth quarter, but Harbaugh said he didn’t believe it was anything serious. … Defensive lineman Carl Davis and tight end Maxx Williams also went down during the game. They returned to action. … The Ravens’ inactives along with Perriman, West and Stanley were guard Maurquice Shakir, defensive ends Bronson Kaufusi and Chris Wormley, and cornerback Jaylen Hill. Offensive tackle Andrew Donnal, who was picked up off waivers from the Los Angeles Rams during the week, was active. The temperature at kickoff was 28 degrees. … The Ravens improved their record after the bye week since 2002 to an NFL-best 13-3.