Sudden thoughts and second thoughts as the Capitals sort through Sunday’s 4-1 loss to the New York Rangers: Finding his MoJo: Marcus Johansson returned to the lineup after missing 12 straight games with an apparent concussion. Johansson centered a third line with Joel Ward and Jason Chimera and in 15:12 of ice time he recorded one assist, one shot, one hit and two takeaways. “I thought he was one of our best players,” Caps coach Adam Oates said. “It looked like maybe that hit in training camp really did affect him because he didn’t look like what I saw on tape [in his first nine games].” Oates apparently was referring to the collision Johansson had with Alex Ovechkin during training camp drills. Johansson did not miss any action after the hit. He was ineffective in his first four games of the season, was a healthy scratch for two more games, and was ineffective again for five more games before being removed from the lineup. Oates also decided to play Aaron Volpatti and made Wojtek Wolski and Mathieu Perreault healthy scratches. More injury news: John Erskine [upper body] skated warmups but did not play. Jeff Schultz took his spot on a second defense pairing with John Carlson and logged 16:28 in ice time. Oates said Erskine saw the team doctor before the game but did not have a medical report on him after the game.