Sandy Alderson stated he could not “strap [Noah Syndergaard] down and throw him in the [MRI] tube.”
But, yes, he probably could have.
Regulation 2 of the standard player contract, which governs every player in the majors, includes: “The Player, when requested by the Club, must submit to a complete physical examination at the expense of the Club, and if necessary to treatment by a regular physician or dentist in good standing. Upon refusal of the Player to submit to a complete medical or dental examination, the Club may consider such refusal a violation of this regulation and may take such action as it deems advisable under Rule 5 of this contract.