David Ortiz believes Mookie Betts will someday become a $250 million player.

"He's going to be one of the best players in the American League," Ortiz said.

Ortiz pulled Betts aside this offseason to give him his financial prognosis.

Betts' month-by-month OPS in 2015:
April: .658
May: .718
June: .942
July: .693
August: .857
September/October: .998

"You don't know how good he is," Ortiz said, talking about how Betts has improved while changing from position to position. "He's already a leader."