For those who need reminding, this is what happened against the Dodgers last July, http://mlb.mlb.com/video/play.jsp?content_id=10206385. Although he remained in the game for five more innings, Bay did not return for the rest of the season.

What makes me believe that Bay is still suffering from Post Concussion syndrome is that his day and night splits are drastically different. In 26 night games and 94 AB's Bay a batting average of .160, an on base percentage of .243, and slugging just .213 with 10 runs scored 15 hits 1 home run 7 RBI's 10 walks 25 strikeouts and 2 stolen bases.

In just 13 day games and 46 AB's Bay has less strikeouts, about the same amount of runs scored, walked, hits, and stolen bases with a way higher average, on base percentage and slugging percentage with .304 .429 and .416 respectively. Now those numbers alone hint at my theory but what confirms this is Minnesota Twins first baseman Justin Mourneau has the same issue. After his concussion Morneau has struggled to return to his potential MVP form this season. Morneau's day/night splits also hint at the lingering affects of a concussion. One explanation for this happening is that after a concussion, the bright stadium lights make it difficult to see and can cause headaches for those who have suffered a concussion. With the fluorescent lights, which shine brighter than natural light, it is not hard to see that this is possible.

It is difficult to know whether or not Bay will return to his old form this season, if ever. But with this "discovery" I urge fellow Met fans to be patient and let Bay try to find himself.