I think this is a new feature with the Google Knowledge Graph. Spotted via Dr. Pete Meyers of Moz on Twitter - you can now find sport team rosters for baseball, basketball, soccer, hockey, etc when searching for a team name.
Here is a search for the [NY Mets] - yes, finally after dozens of years they are doing well.
You can scroll through the roster and even click on a player's name to get their knowledge graph.
I think this is new, so does Pete.
Forum discussion at Twitter.
Update: I screwed up, this is old.
