David Ortiz and his mysterious tweet are driving Red Sox Nation crazy

Even though he officially retired at the end of last season (one of the greatest final seasons ever), David Ortiz has made subtle hints that's he's interested in a return to baseball. Whether that's through Instagram posts or annihilating tennis balls with his sweet home run stroke.
And then, on Monday, Big Papi sent this very obscure tweet into the Twitter abyss: 

Is it an announcement? Is it a mistake? Does he need to renew his subscription to The Boston Globe? WHAT IS IT BIG PAPI PLEASE TELL US NOW. 
The Globe responded:

And then others began to speculate and perspire:

Yup, I guess that settles it -- see you in Spring Training, Papi.
 h/t The Boston Globe