OWINGS MILLS, Md. — With a 1-3 record to begin 2015, the Ravens can’t afford to take any opponent lightly. Not even the Cleveland Browns. That sentiment rings truer without veteran wideout Steve Smith, who is expected to miss Sunday’s game with microfractures in his lower back suffered in last week’s win in Pittsburgh. In two games over Cleveland a year ago, Smith caught 13 passes for 191 yards in two fourth-quarter comeback victories. The Ravens instead will count on a quartet of receivers who have combined for 21 receptions and 264 yards so far this season, eight fewer catches and 109 fewer receiving yards than Smith in his four games. “It’s definitely not ideal. It’s going to be a little bit challenging for us an offense, but it’s just the way it is,” quarterback Joe Flacco said. “We wouldn’t want it any other way. These are the guys that are going to go out there and make plays for us, start making a name for themselves, and help us win, so I’m excited about it.” It’s a given that Flacco will need to be sharper than he was a week ago when he turned the ball over twice in
