Guys - I think something we're all missing here is this:
"Yet, even if he starts with the big club prior to April 12 and ends up spending the 20 or more days in the minors, free agency eligibility won’t come until after ’19."
So, if Ortiz is out, there is always the option to bring up Bradley, then send him back to Pawtucket the day Ortiz gets back, leave him there for 20 days while this lineup doesn't need the extra stick, and then bring him back up once he's fulfilled that 20 days in the minors. That would both allow us to start out the season with him, have him up here while Ortiz is out for the entirety of his leave, and still not lose a year of control.