https://www.washingtonpost.com/sports/2018/12/07/mark-lerner-bryce-harper-i-think-theyve-decided-move/?utm_term=.ec82e47569e5

Apparently, a 10 yr $300M contract ain't enough; even if Bryce wanted to come back, Mark Lerner says the offer is off the table:

“If he comes back , it’s a strong possibility that we won’t be able to make it work. But I really don’t expect him to come back at this point. I think they’ve decided to move on. There’s just too much money out there that he’d be leaving on the table. That’s just not Mr. Boras’s M.O., to leave money on the table.”