Colt Keith probably wasn't going to tag out Springer on that double in any event, but he is going to have to learn how to take the throw from the outfield and stab his glove directly down to the base, to get the runner sliding into it, rather than reaching behind the bag a couple feet for the tag of the runner's, I don't know, butt? Point is, keep the glove in front of the runner, not behind him.