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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Mikie Mahtook is healthy and riding his old swing to a resurgent campaign with the Detroit Tigers. Acquired from the Tampa Bay Rays in January for a PTBNL (Drew Smith), the 27-year-old outfielder is slashing a robust .288/.338/.464, with nine home runs in just 267 at-bats. Following a sluggish start that included limited playing time, he’s emerged as one of the few bright spots on what has turned into a moribund Motown ball club.

Last year was tough sledding for the Louisiana State University product. Coming off an impressive 41-game cameo with the club that drafted him 31st overall in 2011, he logged a .525 OPS over 196 plate appearance. Physical issues played a role — oblique and hand injuries were the primary bugaboos — but thanks to an offseason of healing and hard work, Mahtook is once again at full strength.

The change of scenery isn’t hurting. The Tigers are in team in transition, which means Mahtook is getting an opportunity to show what he can do. His body is giving him that opportunity, as well. Mahtook talked about his 2016 maladies, and the return of his swing, in the middle of this month.

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Mikie Mahtook: “I’m healthy. Last year I wasn’t. I hurt my oblique at the beginning of the season and it really affected my swing, which in turn affected my approach at the plate. Instead of being linear and allowing the ball to travel — staying extended and getting through the ball — I was basically cheating toward it to mask the pain in my oblique. I was going forward and everything was rotating toward left field.

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We’ve seen a lot of premium free agents negotiate opt-outs into their contracts in recent years. Teams like the fact that they can use opt-outs to decrease the total amount they have to guarantee the player in order to sign him, and players like the flexibility of hitting the market again if they play well and increase their value. But by and large, most of these end up not getting used, as free agents are almost always older players by design, and older players usually don’t get better as they age.

Johnny Cueto has an opt-out for this winter that he almost certainly won’t use, as his poor 2017 season — and now an extended DL stint — would force him to take a pay cut this winter. Masahiro Tanaka probably won’t use his opt-out this winter either, since he’s developed a home run problem this year. Wei-Yin Chen definitely isn’t opting out. Neither is Ian Kennedy. Looking ahead to the future, it’s hard to imagine either Jason Heyward or David Price walking away from the remainder of their guaranteed years at this point.

A year ago, Justin Upton fit into that category. In the first year of his six year, $132 million contract, he hit .246/.310/.465, posting a career-low (as an everyday player) +1.4 WAR. He joined a host of other albatross contracts in Detroit, and all the money owed to aging, unproductive players was part of the reason the Tigers decided to start rebuilding this year, moving veterans for younger, cheaper talents when they could.

But this year, Upton has gone right back to being the Justin Upton the Tigers hoped they were signing. He’s currently at .282/.366/.546 and +4.1 WAR; his 140 wRC+ would be the second-best of his career, behind just the 141 mark he put up in 2011. He won’t match the +6.3 WAR he put up that year, but if he finishes strong over the next six weeks, he’ll crack +5 WAR for just the second time in his career. Regardless of how he finishes, this will likely go down as one of Upton’s best seasons.

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Miguel Cabrera and Joey Votto — they’re both cinch future Hall of Famers, as close approximations as any among current major leaguers to the ideal all-around hitter. They have consistently made hard contact to all fields, hit for average and power, and not conceded many free outs to opposing pitchers. And obviously, they’ve done it without any contribution from their legs; it’s been all bat.

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Anthony Castro is emerging as one of the top pitching prospects in the Detroit Tigers organization. Two years removed from Tommy John surgery and armed with plus stuff, the 22-year-old right-hander is 9-4 with a 2.70 ERA in 18 starts for the Low-A West Michigan Whitecaps.

Following his last outing, a coach for the opposing team was highly complimentary of Castro’s cutter, which is actually a mid-90s four-seam fastball that has natural cutting action. As the native of Caracas, Venezuela, explained, “It just comes out that way. That’s crazy.”

It’s not crazy to believe he’s ready to prove himself at the next level. As the aforementioned coach told me, “I’m not sure why the kid is still in the Midwest League.”

Castro has taken his family out of their homeland, and for perfectly understandable reasons: with the situation in Venezuela growing increasingly worse, the youngster feared for their safety and well-being.

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While writing about Miguel Sano last week, I connected two thoughts that had laid dormant next to each other for a while.

Those thoughts, as follows:

1. It’s easier to lift and drive balls that appear in certain parts of the zone; and
2. How pitchers approach batters in terms of location is part of an endless loop of adjustments that makes judging a batter’s true talent difficult.

That confluence of ideas led to an innocuous enough question: could we adjust exit velocity for pitch location?

The answer is yes, of course we can. The next question, however, was much more interesting: what the heck does this measure?

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Below are the updated summer top-10 prospect lists for the orgs in the American League Central. I have notes beneath the top 10s explaining why some of these prospects have moved up or down. For detailed scouting information on individual players, check out the player’s profile page which may include tool grades and/or links to Daily Prospect Notes posts in which they’ve appeared this season. For detailed info on players drafted or signed this year, check out our sortable boards.

Chicago White Sox (Preseason List)

1. Yoan Moncada, 2B
2. Eloy Jimenez, OF
3. Michael Kopech, RHP
4. Lucas Giolito, RHP
5. Luis Robert, OF
6. Reynaldo Lopez, RHP
7. Blake Rutherford, OF
8. Alec Hansen, RHP
9. Dylan Cease, RHP
10. Zack Collins, C

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This is Ashley MacLennan’s second piece as part of her August residency at FanGraphs. Ashley is a staff writer for Bless You Boys, the SB Nation blog dedicated to the Detroit Tigers, and runs her own site at 90 Feet From Home. She can also be found on Twitter. She’ll be contributing regularly here over the next month. Read the work of all our residents here.

For a team that seemed poised to begin the rebuild process, the Detroit Tigers managed to coast through the trade deadline doing very little. They’ve been promising since the offseason that their goal is to become leaner and younger, but when July 31st had passed, they’d only moved three players. Observers are left asking themselves: have the Tigers done enough to craft a contending team for the future?

The short answer? No.

The more complicated answer is that the team may not have been able to make the moves they wanted, thanks to a market that favored relief pitching over everything else.

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It wasn’t a big surprise when Justin Verlander stayed in Detroit at the July 31st trade deadline, because for Verlander, the 31st wasn’t really a deadline. With $28 million salaries for each of the next two years, he wasn’t in much danger of being claimed on waivers; sure enough, he reportedly went unclaimed last week, and is again free to be traded to any team in baseball. And now that prospective buyers don’t have the distraction of other possible options, it might actually be easier for the Tigers to trade Verlander this month than it was in July.

Of course, easier doesn’t mean easy. As Jeff noted a month ago, there appears to be something of a gap between how the Tigers see Verlander and how the rest of the league sees him. Detroit seemingly is shopping him as if he’s still the ace he pitched like last season, not the average-ish starter he’s pitched like this season. And Jeff’s piece laid out why that isn’t a totally unreasonable position.

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