Notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Forrest Whitley, RHP, Houston Astros (Profile)
Level: Double-A   Age: 20   Org Rank: 7  FV: 60
Line: 4 IP, 2 H, 1 BB, 7 K, 0 R

Notes
This is the best pitching prospect in baseball, wielding ungodly stuff that spiked when he dropped about 60 pounds throughout his senior year of high school. He’s also on Driveline’s weighted-ball program. He’ll show your four plus or better pitches over the course of an outing. Whitley has yet to allow a run since returning from suspension. The suspension might be a blessing in disguise for Houston, who could now conceivably weave him into their playoff plans without fear of overworking Whitley’s innings count.

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Notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

We’re entering a time on the scouting calendar when a great shift in resources occurs. Short-season leagues get underway this week (if they haven’t already), which means some amateur scouts will pick up regional pro coverage now that the draft is done, while others stay on the amateur showcase circuit to prep for 2019. It also means teams that know if they’re buying or selling at the trade deadline can target scouting resources more efficiently by identifying likely trade partners and focusing on those systems. For example, the Padres have probably considered what teams are in need of lefty relief help at the deadline and have made it an organizational priority to know about those teams’ systems more than the systems of other rebuilding clubs. Daily Prospect Notes returns as a space to explain and discuss concepts like this, individual performers, my in-person notes, and whatever else I see fit to talk about.

Yordan Alvarez, 1B/OF, Houston Astros (Profile)
Level: Double-A   Age: 20   Org Rank: 3  FV: 55
Line: 2-for-5, HR

Notes
Sunday was Alvarez’s first game back from a hand injury that cost him about a month and a half. Injuries have limited him to 134 games combined in parts of three pro seasons. Between those extended periods of inactivity, however, Alvarez has dominated. This is a giant 20-year-old who is remarkably athletic and twitchy for his size and crushing Double-A in a modest sample. This was the relatively unknown guy that the Dodgers signed for $2 million just before the clock struck midnight on the 2015 July 2 period. He hadn’t suited up for the Dodgers before they sent him to Houston for Josh Fields, and now he’s the best prospect from that 2015 Dodgers July 2 class by a sizable margin. He’s a potential middle-of-the-order force and quickly closing in on an increasingly expendable A.J. Reed.

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Instructional League began in Arizona on Wednesday with the Texas and San Diego groups playing in Peoria, AZ. Lefty Brett Martin started for Texas and sat 92-94 with his downhill fastball, touching 95. He frequently utilized a changeup that flashed average, but was mostly below in the 83-85 mph range with an upper-80s cutter. I saw no curveballs from Martin, which I had previously evaluated as his best secondary pitch. I’m not certain if the pitch has been scrapped temporarily for developmental purposes — or perhaps medical ones, as Rangers pitchers in Extended were on fastball-only programs for a while — or if he simply didn’t happen to throw any. Regardless, Martin’s changeup needs reps, as he’s missed significant time with injury during each of the last three years. Between 2015 and -17 he’s had hip, elbow, and back issues. He has mid-rotation upside if he can stay healthy and more consistently locate a fully developed changeup.

Speaking of changeups, Cole Ragans is going to have a really good one. The Rangers 19-year-old lefty sat 88-91 with his fastball yesterday and flashed an above-average, fading changeup in the upper 70s. I have it and Ragans’ command projected to plus. His fastball is a 40 on pure velocity but plays better than that due to plane and deception. He also showed a fringey, low-70s curveball. I can see the basis for the Cole Hamels comparisons, as there are some mechanical similarities and the repertoire is structured similarly. That said, Ragans isn’t as graceful and athletic as Hamels is/was, nor does he have the velocity. Yet.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

8/28

Tom de Blok, RHP, Detroit (Profile)
Level: Low-A   Age: 21   Org Rank: NR  Top 100: NR
Line: 7 IP, 2 H, 1 BB, 0 R, 8 K

Notes
de Blok has been one of the more interesting stories in minor-league baseball this year. He was signed out of the Netherlands by Seattle in August of 2013, but he didn’t enjoy his time training in Arizona, some of his things were stolen, and de Blok retired during extended spring training the following year.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Michael Hermosillo, OF, Los Angeles AL (Profile)
Level: Triple-A   Age: 22   Org Rank: 14  Top 100: NR
Line: 3-for-4, 2 HR, BB

Notes
Hermosillo, a 28th rounder in 2013, was a two-sport high schooler committed to play football at Illinois, but he was coaxed into pro ball by a $100,000 signing bonus. He opened up his stance a bit last year and hit fairly well during an injury-shortened regular season before heading to the Arizona Fall League, where his physical tools measured up nicely compared to some of baseball’s better prospects.

This year, Hermosillo’s in-box footwork has again been tweaked, and he’s deploying a slower, more committed leg kick. Hitters who have deployed a leg kick like this in recent years have noted that it not only unlocks more pull-side power but also improves their timing. This is what seems to have happened for Hermosillo, who’s now more consistent and comfortable in the batter’s box than he was last season. He’s patient, athletic, and might do enough offensive damage to project in more than just a bench outfield role if these changes have truly unlocked previously dormant physical ability.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

8/23

Mike O’Reilly, RHP, St. Louis (Profile)
Level: Hi-A   Age: 22   Org Rank: NR  Top 100: NR
Line: 6 IP, 9 H, 0 BB, 2 R, 7 K

Notes
A 27th rounder out of Flagler College last year, O’Reilly was promoted to High-A Palm Beach in late July after a dominant four-game stretch of Midwest League starts that included a complete game, one-hit, 12-strikeout performance. O’Reilly doesn’t throw all that hard, sitting 88-91, but he’s deceptive, he can locate his breaking ball for strikes, and he flashes a plus changeup. There’s some risk that O’Reilly’s fastball won’t be effective against upper-level hitters, but he has quality secondary stuff, throws strikes, and overall has a profile in line with valuable upper-level pitching depth.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Victor Robles, CF, Washington (Profile)
Level: Double-A   Age: 20   Org Rank: 1  Top 100: 8
Line: 3-for-5, 2B, HR, SB

Notes
Robles is slashing .320/.375/.505 since his promotion to Double-A and has tallied a career-high 51 extra-base hits already this year. Many of those are doubles hooked down the left-field line that Robles turns into extra bases because of his plus-plus speed. Though he still has occasional lapses out there right now, that speed is likely to make Robles a very good defensive center fielder at maturity as he runs down balls in the gaps that many center fielders cannot. Scouts anticipate Robles will hit around .300 with some pop — though probably not quite as much as he’s shown this year — while playing good defense in center field. As a point of reference, Lorenzo Cain, a good defensive center fielder, has slashed .295/.360/.440 this season with strikeout and walk rates within 1% of Robles’ career marks. Cain has generated 3.3 WAR in 119 games this year. That appears to be a very reasonable outcome for Robles, who is one of baseball’s best prospects.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Pedro Avila, RHP, San Diego (Profile)
Level: Low-A   Age: 20   Org Rank: NR  Top 100: NR
Line: 7.1 IP, 4 H, 2 BB, 1 R, 13 K

Notes
This was Avila’s fifth double-digit strikeout game this year and his second in the last three starts, as he K’d 18 at Great Lakes on August 8th. A stocky 5-foot-11, Avila doesn’t have a huge fastball, sitting mostly 91-93 and dipping just beneath that from the stretch, but he frequently demonstrates pinpoint command of it, working to both his arm and glove sides. That gets Avila ahead in the count and sets up his deep-diving curveball, which bites enough to miss bats in the strike zone as well as below it. He also flashes a plus changeup. Avila began the year in High-A and struggled to throw strikes (but not miss bats) there for nine starts before a demotion. He has 102 strikeouts in 74.2 innings since then. Avila was acquired during Winter Meetings from Washington in exchange for Derek Norris.

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Daily notes on prospects from lead prospect analyst Eric Longenhagen. Read previous installments here.

Games of 8/9

Dakota Mekkes, RHP, Chicago NL (Profile)
Level: Hi-A   Age: 22   Org Rank: HM  Top 100: NR
Line: 7 IP, 4 H, 1 BB, 0 R, 9 K

Notes
Looking at his stuff in the absence of context, Mekkes is barely a middle-relief prospect. His fastball typically sits in the low 90s and his slider is solid average, perhaps a tick above. But Mekkes is a gargantuan 6-foot-7, takes a large stride toward the plate, and releases the ball much closer to the plate than the average pitcher, creating a Doug Fister-like effect that allows his stuff to play up. He has a 1.00 career ERA in pro ball and has allowed just 32 hits in 61 innings this year while striking out 80.

Like most XXL pitchers in their early 20s, Mekkes struggles with control, but hitters’ inability to adjust to his delivery in short stints has limited their overall ability to reach base. As a result, he has a WHIP under 1.00 despite an 11% walk rate. It’s hard to say how this rare type of deception will play in a big league, assuming upper-level hitters are still flummoxed by it as Mekkes moves on. Jordan Walden was dominant for a half decade with a similar type of deception but had much better stuff. Regardless, it’s worth noting that Chris Mitchell had flagged Mekkes as a noteworthy prospect before he was drafted.

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