Rivero spent the 2010 season with Double-A Akron. He hit .232 with six home runs, 43 RBIs, a .278 on-base percentage and a .325 slugging percentage in 110 games.
The Phillies have 34 players on their 40-man roster.
In other news, the Houston Astros interviewed former Phillies hitting coach Milt Thompson for the same position in their organization on Monday, according to agent Burton Rocks.
Todd Zolecki is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.