A knee prosthesis (10) constructed in accordance to the present disclosure includes a femoral component (12) and a boss (14). The femoral component can have a first condylar portion (20) and a second condylar portion (22) connected by an inner condylar portion (30) that defines an intercondylar recess (32), the inner condylar portion having a first engagement portion (40) comprising a first plurality of engaging members (42) extending therefrom. The boss can have a longitudinal body (60) extending along a boss axis (62) between first (64) and second (66) ends. The first end can be configured to selectively mate with a stem (16). The second end can include a second engagement portion (80) comprising a second plurality of engaging members (82) extending therefrom. The second engagement portion of the boss can be selectively coupled to the first engagement portion of the femoral component in a plurality of discrete positions to attain a corresponding plurality of angles of the boss axis relative to the femoral component.
