Just ask Clayton Kershaw, Jason Heyward, Manny Machado, J.D. Martinez and David Price. "[Boras] knew from the beginning I didn't want to be traded, and I didn't want the opt-out at all," Harper said. Machado, who held the record for the largest free agent contract for a little over a week, has an out after five years so that he can still hit the market again at age 31.