With mounds of dirt, construction vehicles and the exact location where home plate will be at the new Athletics ballpark serving as the backdrop, team owner John Fisher stood in front of a large gathering with one message: “We are Vegas’ team.” MLB commissioner Rob Manfred, state and local government dignitaries, former Athletics greats such as Rollie Fingers and Dave Stewart, Little Leaguers and many others looked on Monday as the team celebrated the groundbreaking of a $1.75 billion, 33,000-person capacity ballpark that is expected to be finished in time for the 2028 season.