1. J.D. Martinez

Position: OF | Age: 30

Current Team: Diamondbacks | Best Fit: Astros

2017 Stats: .303 BA, 1.066 OPS, 45 HR, 104 RBI, 4 SB

The Astros cut Martinez near the end of spring training of 2014, but only after he'd passed through waivers and all 29 other clubs declined to pick him up. Since then, he's posted the seventh-best OPS (.936) of any hitter in the majors. He's a legitimate superstar, albeit without the profile of one, and the Astros could correct their mistake by bringing him back to fill the likely departing Carlos Beltran's spot in the lineup.