Alfonso! 2 K's

Why would any pitcher ever throw Alfonso anything other than a curve ball? Reminds me of the Giants 3rd baseman from the year the Cubs played the giants in the playoffs (Matt something??). Could not hit a curve ball if his life depended on it. So Fontenot gets tired of him fouling off his curve ball and tries to sneak by an 85 mph fast ball - BAM - 3 run home run.