An error , by definition , is failing to make a play that a major league player should make . It happens a lot. The way I saw it , Puig hit the ball sharply up the middle , Kinsler going to his right , fielded it and his cleats seemed to grab as he spun to throw to first. He stumbled and the throw sailed up the line. A costly error no doubt. He felt badly about it and apologized to Eovaldi. Eovaldi responded that there was nothing to apologize for. He said , " He's got my back and I've got his. " That's a good teammate . There were many other situations before and after that could have changed the result of the game.