Pitta was carted off the field after his injury in the second quarter of Sunday's game against the Cleveland Browns and remained hospitalized overnight in Cleveland.
This is the second time Pitta has injured his right hip in just over a year. He dislocated and fractured the hip during training camp last season and played just four games.
The Ravens placed Pitta on injured reserve on Tuesday. He is out for the season.
In the first two games of the season, Pitta caught 13 passes for 113 yards.
In March, the Ravens signed Pitta to a five-year, $32 million contract. $16 million of the deal is guaranteed.
- Sarah Barshop