A PA28 pilot was informed by ATC while in the Hudson VFR Corridor that a Yankee ballgame was in progress. Prior to flight he check NOTAMs/TFR's and other sources but did not see the TFR identified.

Narrative

The flight was VFR in the Hudson River corridor. Prior to flight both pilots checked; AOPA and FAA NOTAM's/TFR. Upon reading all of those none outlined TFR's in the VFR corridor. The flight was carried on; and we reached the Hudson. Not until we pasted the George Washington Bridge was it announced that a ball game was going on; and numerous single engine planes were passing through the northern part of the Hudson River. I estimate we where 2.5 -- 3 NM from the stadium; and it is possible that we touched the edge of a TFR. What caused this issue was the fact that stadium and event TFR's are not given as much attention along with not high lighted like other TFR's. On this same day; numerous aircraft where seen passing through the TFR. This is something that needs to be addressed because many people are not seeing this TFR. To prevent this recurrence; I feel that this TFR should be added into the FAA safety training on the VFR corridor because this is something that a lot of people do not know and realize. Also the FAA should publish the TFR and make them easy to find because stadium/event TFR's are treated almost to be non existent. The easiest fix for this is make this a major TFR or make the TFR around this stadium smaller; like 2 to 1 miles in size. This will continue to be an ongoing issue because of the current presentation; and knowledge that people have about the Hudson River VFR corridor. This is a fun trip that can keep people out of trouble if the information is presented better.