The former Ottawa High School standout placed fourth with a top throw of 16.92m (55 feet, 6.25 inches).
“I am so honored to be chosen to represent Team USA,” Peoples said. “It was awesome to be able to meet great athletes from around our country and to meet people from other teams.
“For being so late in the summer and having a couple weeks off throwing, a little under 17-meters is awesome.
“Although getting fourth stings, it makes me excited for the year ahead.”
Included among the competition were three-fellow top-25 shot putters on the IAAF (International Association of Athletic Federations) world rankings, including current No. 17 and two-time IAAF World Championships top-15 finisher, Lopez Yaniuvis (Cuba).
Yaniuvis won Friday afternoon’s competition, followed closely by two-time South American Champion and No. 19 in the world, Natalia Duco (Chile).
Just ahead of Peoples in third was U.S. teammate Brittany Smith, currently No. 13 in the world and the 2012 NACAC U23 Shot Put Champion.
She entered the weekend at No. 23 slot in the rankings.