Minor Impacts: Aug. 6

Every Thursday throughout the season, Minor Impacts takes a look at some of the hottest minor league players that could have impacts at the Major League Level in the near future. Some of the players we’ve educated you on before their promotions include: Vince Mazzaro, Andrew McCutchen, Gordon Beckham, Alex Avila, Brian Matusz, Marc Rzepczynski, Jake Fox, Nolan Reimold, Daniel Bard, Bud Norris, and Mat Latos.

Desmond Jennings: When a left shoulder injury wiped out most of Jennings’ 2007 season, it stood to reason that the talented outfielder’s timetable would get pushed back. However, no one told Jennings. The 22-year-old picked up right where he left off in 2007. In fact, his two triple-slash lines are almost eerily similar to this point:

.315/.401/.465 (in 387 at-bats at high-A in 2007)
.316/.395/.486 (in 383 at-bats at double-A in 2009)

Even Jennings’ walk rates and strikeout rates are similar. His wOBA, though, has improved from .399 to .415. With 100 games under his belt in double-A, Rays management recently promoted Jennings to triple-A. In four games, he’s hitting .250 with a double, four Ks and a couple of stolen bases. Defensively, the center fielder has good range and an average arm. He may get a taste of the Majors this September and Jennings should be ready to contribute on a regular basis by mid-2010. That would give the Rays an incredibly athletic outfield with Carl Crawford and B.J. Upton already on hand.

Jose Tabata: Like Jennings, this former Yankees’ prospect has also benefited from a recent promotion to triple-A. Tabata battled injuries (and the tabloids, thanks to his wife) early on in the season before establishing himself at double-A with a line of .303/.370/.404 with two homers and seven steals (in 13 attempts) in 228 at-bats. The right-handed hitter has yet to show the power expected of him but he’s hitting for average and controlling the strike zone well (11 K%). At only 20 years of age, Tabata has time to learn to drive the ball over the fences with more regularity. Defensively, he is a good center fielder, but he won’t move Andrew McCutchen out of position in Pittsburgh. As a result, Tabata will probably end up in right field, thanks to his strong arm. When that happens, though, his lack of power will become even more evident.

Ian Desmond: We’ve been hearing hype on Desmond for a while now but the slick fielder is just beginning to justify that talk with his performance at the plate. After struggling to hit for average early in his career, the 23-year-old prospect his .306/.372/.494 with six homers and 13 steals in 170 at-bats in double-A. Desmond still needs to show a little more patience at the plate with a walk rate of just 8.6 BB%. Another word of warning: Desmond’s BABIP is much higher this season over his career norm. In two previous stints in double-A, his BABIPs were .256 and .296. This year it was .371. His offensive showing in double-A was good enough to get him promoted to triple-A where he is currently hitting .298/.420/.351 through 18 games. With the club having given a two-year extension through 2010 to incumbent shortstop Cristian Guzman, it buys Desmond a little more time to hone his batting skills in triple-A next year. However, an injury to Guzman (or perhaps a trade to free up his $8 million salary) could get Desmond to Washington by the end of July next year.

Jason Castro: The Astros organization has slowly been benefiting from its minor league system over the past few seasons and it has enjoyed contributions from players such as Hunter Pence and Bud Norris. Catcher Jason Castro – the club’s 2008 first-round pick – should be the next significant contributor after surpassing J.R. Towles as the club’s backstop of the future. Castro, 22, began the 2009 season in high-A and hit .309/.399/.517 with seven homers in 207 at-bats. The left-handed hitter was then moved up to double-A where he is currently hitting .304/.358/.405 with two homers in 148 at-bats. His power numbers were probably exaggerated a bit in high-A ball due to the fact he was playing in Lancaster (one of the best offensive parks in minor league ball) and his ISO has dropped from .208 in high-A to .101 in double-A. Regardless, he’s still an above-average offensive catcher who has really improved defensively behind the dish.

Jake Arrieta: With fellow pitching prospects Brian Matusz and Chris Tillman having recently arrived in the Majors, Arrieta is now waiting for his shot in Baltimore. The right-hander’s ceiling is not quite as high as the other two pitchers but he should slide into the No. 3 spot in the rotation very nicely. Arrieta, 23, began the year in double-A where he allowed 45 hits in 59 innings of work. He also posted rates of 3.51 BB/9 and 10.68 K/9. Promoted to triple-A, Arrieta has struggled a bit with 56 hits allowed in 51.2 innings. He’s posted a walk rate of 3.14 and a strikeout rate of 8.54 K/9. The right-hander has also allowed almost twice as many home runs but in eight fewer innings. His repertoire includes a fastball that can touch the mid-90s, a slider and a changeup.

Andrew Cashner: After having success in the bullpen in college, Cashner rose into the first round of the draft in 2008, which is where the Cubs organization nabbed him. He was moved into the starting rotation in pro ball to get more innings under his belt and he may end up sticking as a starter. Cashner began the year in high-A where he allowed 31 hits in 42 innings of work, while also posting a walk rate of 3.21 BB/9 and a strikeout rate of 7.29 K/9. With a promotion to double-A, the right-hander has allowed just 14 hits in 24.2 innings. His rates have remained almost exactly the same. He’s also done a nice job of keeping the ball in the park with just one homer allowed on the year. The Cubs rotation does not look as formidable as it once did so Cashner could help out sooner rather than later. With any luck, though, the organization will avoid bouncing him back and forth between the rotation and the ‘pen, which it did with Jeff Samardzija (with limited success). Cashner’s repertoire includes a fastball that can touch 97 mph (more often out of the ‘pen), a plus slider, and a changeup.