They all wear gloves during their games. Gloves have been in use since 400 BC. They are used for many different kinds of sports like those named above in addition to fencing, cycling and cricket among many others. In order to learn more about them, visit http://en.wikipedia.org/wiki/Glove#Sport_and_recreational.
Ok. No they cannot win or lose the game. What if a starting pitcher let's in no runs then the closing pitcher let's in five and your team only scored four. Your team could've helped out by scoring more. So they have gloves in common. OH, they can all throw a ball! They also are the team leaders. If they're having a bad game, their team will probably have a bad game! Hope this helps!