The Cardinals are in the market for pitching, with the bullpens in San Diego and Minnesota being two possible places to look.
Padres closer Heath Bell has been a reported target, though recent indications have the Cardinals unlikely to pay the current asking price.
While declining to offer specific targets, Mozeliak said the Cardinals could target starters or relievers.
"How we square that circle, time will tell," Mozeliak said.
Asked if the Cardinals have payroll flexibility, the GM answered: "That's a tough question to answer because it just depends on what we're getting. And the other part of that equation is what are you giving up.
"Are we in position to make a move? I think the answer is yes."