The team announced the results of an MRI and CT scan Monday, one day after Pujols was injured during a home game against Kansas City. The team said Pujols has a non-displaced fracture of his left radius and his arm is in a splint.
General manager John Mozeliak was scheduled to discuss the situation Monday afternoon.
Pujols is hitting .279 this year, starting to heat up after a slow start. The team said his left shoulder was sore, but no structural damage was found.
The three-time NL MVP was hurt after Wilson Betemit hit a chopper up the middle off Cardinals starter Jamie Garcia.
Second baseman Pete Kozma backhanded the ball and made a jump-throw to first, pulling Pujols off the bag toward home. As the slugger tried for a tag, Betemit ran into his glove hand and Pujols went down to the ground in pain.