That would be enough for first place on most teams, but not the Astros. Broadcaster Milo Hamilton is also in Washington this weekend, and made the new stadium the 57th ballpark he's broadcasted from during his career.
Hamilton doesn't travel on the road with the team, but makes exceptions when the Astros travel to a ballpark he has not yet seen.
This is the first season of baseball at Nationals Park. Hamilton previously broadcasted in D.C. from RFK Stadium, and before that, Griffith Stadium.
Ausmus credited his high number to playing in an era of unprecedented ballpark construction. He said that it's tough to keep up the way stadiums are springing up recently.
"In the next couple years, there will be another three I haven't been to," he said. "The two new stadiums in New York, and there will be a new one in Minnesota."
Since making his debut in 1993, Ausmus has played for three different teams, the Padres, Tigers and Astros.
"Brad has been around forever," manager Cecil Cooper joked.
This year, Ausmus is hitting .221 with 14 RBIs, in addition to the leadership that Cooper said he provides.
"He's like a coach, really," Cooper said. "In the position he plays and all the taxing demands, he's been a real trooper."
Don't expect Ausmus to make any new ballpark news this season -- he's played in all 30 stadiums that are currently in use. Hamilton is still catching up, as he has spent his entire broadcasting career in the National League, meaning that only with the addition of Interleague Play has he been able to visit American League parks.
Michael Phillips is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.