It’s moments like these that send a shiver through a fan base. The Royals scratched left fielder Alex Gordon from Monday’s lineup against Arizona after he reported tightness in his lower back. And the social media, so informed…stop right there. Gordon insisted he is “fine.” The Royals characterized the move as precautionary. “I think it happened Sunday,” Gordon said, “when it was so cold and we were sitting around. It just tightened up a little bit. Some back spasms. When I felt it today (in the batting cage), we just decided to shut it down as a precaution. “I mean, I like to play every day, but…” It’s February. “It’s just way too early to be pushing anything,” manager Ned Yost cautioned. “So we made a lineup change.”