Tim Tebow suddenly looking like a pro baseball player

The jokes have slowed considerably. The playful jabs have begun to subside. Tim Tebow is proving he belongs, and lately he’s doing more than that. He has been performing at a high level this month. Just ask opposing Double-A managers who raved about the strides the former Heisman Trophy winner has made this year with the Mets’ affiliate in Binghamton. They have cited his improved plate discipline, pitch recognition and opposite-field power. “He looks like a different guy than last year,� Double-A Hartford manager Warren Schaeffer told The Post in a phone interview. After quitting football following failed stints with the Broncos and Jets, and signing in September 2016 with the Mets, the doubts