The Mets didn't know he was injured when they drafted him or negotiated the $6M signing bonus because he didn't submit a predraft MRI. He knew if he did it would raise red flags though most teams suspected he was injured. The Mets aren't getting the player they thought they drafted and Rocker wants to get paid like he's not injured.
Gunnar Hoglund is injured and signed for $3.25M. If healthy he would have received a much higher bonus. Injured players take less money but Rocker thinks he's different.