The Rafters possess perhaps the least amount of offensive fire power, but that doesn't mean they don't have intriguing prospects worth watching.
Rendon was the 6th overall pick in 2011 and has barely been on the field since, losing the majority of the 2012 season to an ankle injury. He came with injury risks when he was drafted, which is what caused his drop to the Nationals anyway, and at the end of the day, we don't know much more about Rendon today than we did when he was drafted a year and a half ago. If he can manage to stay healthy for a month, we might finally learn something about what kind of professional be will become.
After a monster 2011 season, big things were expected out of Marisnick in 2012, but it didn't happen. The toolsy Marisnick showed some power in the Florida State League (which is not an easy task), but didn't exactly dominate the league, hitting .263 in 65 games. He probably would have been best suited playing a full season there, but the Blue Jays promoted him nonetheless, only to see him struggle mightily in Double-A, posting a .622 OPS in 55 games.
Brian Goodwin (WAS)
Goodwin was drafted out of junior college as a part of a deep Nationals 2011 draft, and got his first taste of professional ball in the South Atlantic League. He dominated the Sally League, hitting .324/.438/.542 before a promotion. That promotion, however, skipped him over the Carolina League and jumped the talented outfielder to the Double-A Eastern League and hit just .223 in 42 games. Goodwin has good power and is a strong hitter that could go nuts in the AFL and should return to take another crack at Double-A next season.
Other Notable Hitters
Trayce Thompson has big power but strikes out a ton. He's hit or miss, but he has the power to lead the AFL in home runs in a short season. Chris Owings had a strong first-half in the California League after struggling there last year, but then struggled again in Double-A. The Diamondbacks need to see him hit somewhere outside of the California League. Matt Skole had a breakout season and looks to test his plus-on-base skills against advanced competition after dominating Low-A ball this season.
Arsenal of Arms
Rienzo had a strong seazon bookending a suspension for violating the minor league drug policy. He continues to miss more bats than his stuff would indicate he should, and demonstrate good control as he pushes to remain a starter.
Deck McGuire (TOR)
The former first-rounder out of 2010 got rocked in Double-A this season, with a 5.88 ERA in 28 starts and just 6.1 strikeouts per nine innings. He got hit hard in the Eastern League, which doesn't bode well for his time in the desert. McGuire doesn't miss many bats, which makes it even harder to pitch in the AFL, and with a disappointing season behind him, McGuire needs a strong AFL showing to avoid a return to Double-A, which may be inevitable anyway.
Other Notable Arms
2008 over-slot signee Paul Demny has struggled more and more as he moves up the Nationals organization. Chase Anderson emerged this season as a potential prospect for the Diamondbacks in his first season as a full-time starter. It will be tough for him to earn a spot in their major league rotation, however, given the pitching depth in their organization.