Alex Rodriguez of the New York Yankees is mired in a home run slump. He last homered on June 11 and in the last 22 games he hit well, but just did not deliver a long ball. Given that he's collecting a good number of base hits, it doesn't seem like there is anything wrong with his swing.
As a prolific home run hitter, PITCHf/x provides a nice sample of where A-Rod likes the ball in the the strike zone in order to take it deep:
Alex Rodriguez, pitch frequency, home runs, 2008-2011.The black box gives you an idea of where he likes pitches, down in the strike zone so he can get a solid upper cut swing at the pitch. Lately, pitchers avoided that area of the zone:
Alex Rodriguez, pitch frequence June 12, 2011 through July 7, 2011.Rodriguez had a few pitches he might have hit out, but in general the approach against him was very good. Notice this is what I call a septum heat map, where there is a nice separation between inside and outside pitches. If I saw this for a single pitcher, my guess would be that he had a successful streak. In that light, Alex's hitting might be considered impressive. He's taken what pitchers have given him and produced a high BA and high OBP. If pitches start making mistakes against Alex, we should see him driving the ball again.