To recap, the Pirates' Pedro Alvarez hit .042 with a home run over his first eight games last year. Then, he hit .367 with six home runs over his next 14 games. Then, he hit .143 with a home run over his next 33 games (brr, that's cold). Then, he hit .308 with 13 home runs over his next 30 games (ow, that's hot).
Then, he hit .217 with no home runs over his next 20. Then, he hit .407 with six home runs over his next 15. Then, he hit .212 with three home runs over his final 29.
And that, folks, is how he arrived at a .244 batting average and 30 home runs for the season.
After his 4-for-45 start this year, you probably benched him, but seeing as he has three home runs in his last five games, you should probably activate him before the next cold spell arrives.