His agent has to be looking at upside versus downside of not signing.
His possible upside of not signing is he shows he is perfectly healthy, velocity returns, he dominates and then comes back next year as the #1 pick and gets a couple more million than he can secure right now.
The downside is he actually is damaged and needs medical work, or that he gets hurt. . . and then gets drafted in the 4th round next year, and is a year older another year away from free agency.
This is stupid. The kid should reach an agreement and move his career forward now.