#2: Yonathan Perlaza
Consider this an apology for leaving Yonathan Perlaza off of my list of underrated prospects. For years, his numbers had been somewhat pedestrian as he climbed from Rookie Ball to Single-A. He fully found his power stroke at Double-A Tennessee last year, however, slashing an impressive .255/.358/.491 for a career-high.236 ISO. He'd also improve his walk rate to the best of his career at 13.2%. There was even a stretch of time where Perlaza was putting up numbers to rival the white-hot run of Alexander Canario.
Perlaza's improvements were overshadowed considerably by the meteoric rise of Canario in part because he simply didn't have the hype around him. As his Double-A run continued, he just seemed to keep getting better though and now he's knocking at the door of the majors. Spring Training will give him another shot to show off those improvements and, maybe, make a good impression for a future bench job.
As much as keeping Ian Happ would be desired, it's also hard to not look at the switch-hitting Perlaza and see him carving out a potential future if the former walks. He's one of the more interesting non-Brennen Davis or Canario outfielders that could put on a show at Spring Training and make an impact soon.