An elbow prosthesis can include a capitellar implant that has an articulating head and a stem. The articulating head can have a first substantially hemispherical portion and a second portion that collectively extend between lateral and medial sides of the articulating head and are separated by a plane. The first and second portions can generally extend between the lateral and medial sides. The second portion can generally have an attachment lobe that extends on the lateral side and that defines a passage therethrough. The passage can extend at least partially on the second portion.