Back in 2007, Kouz's rookie year, he had a rough start. On May 14 he had an OPS of .424 with just one homer in 105 plate appearances. For the rest of the year he hit .308/.363/.510 for an OPS of .873 while hitting 17 homers (one every 25 pa's). Great things were on the horizon.
Then Kouz again stumbled a bit out of the gates in 2008 with an OPS of .682 on May 14 and one homer for every 59 plate appearanes. After May 14 he had an OPS of .751 with 20 homers (one every 25 pa's). That was more like it.
This year? Kouz had an OPS of .550 on May 14 with one homer in 133 plate appearances. Since that time he has an OPS of .811 with nine homers (one very 16 pa's).
So, to summarize his last three seasons:
- Up to May 14: .221/.260/.316 with one homer every 83 pa's
- Post May 14: .278/.325/.483 with one homer every 23 pa's
Unfortunately, we don't have the answer (and I'd be leery of any hard causal theories), but we are happy that May 14th has passed and the post-May 14 Kouz, he of the .808 OPS, appears to be in the house.