The Kings have scored only three goals during their first-round playoffs series against St. Louis, and the Blues have scored four. The Kings trail the best-of-7 series 2-1 going into Game 4 on Monday night at Staples Center. “There’s all kinds of things that happen within the game,” Kings defenseman Robyn Regehr said. “Some people call it the game within the game. Call it whatever you want. It’s a tough series. It’s been a hard-fought series, a low-scoring, tight series. There’s all kinds of stuff that’s happening out there. As an individual, you want to win as many as those little battles. … I enjoy it, yeah.”