Just when the Texas Rangers were beginning a push for a postseason spot, one of their stars went down for an unusual reason.

Shortstop Corey Seager had an appendectomy Thursday, a procedure that isn’t exactly career-threatening but was a jolt in a sport more used to arm and leg problems. It’s not clear how long Seager will be out. His season could be over , or he might be able to return in a couple of weeks.

The Rangers have won five straight games to pull within 2 1/2 games of division rival Seattle for the last wild card in the American League. Texas now has the third-best run differential in the AL, thanks in part to a 20-3 win over the Los Angeles Angels this week in the team’s last game before Seager’s operation.

Everyone knows how dangerous Bruce Bochy’s team could be if the four-

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