Below are the updated summer top-10 prospect lists for the orgs in the American League West. 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.

Houston Astros (Preseason List)

1. Kyle Tucker, OF
2. Forrest Whitley, RHP
3. Franklin Perez, RHP
4. Yordan Alvarez, 1B
5. Derek Fisher, OF
6. J.B. Bukauskas, RHP
7. Gilberto Celestino
8. Daz Cameron
9. Cionel Perez, LHP
10. Colin Moran, 3B

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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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In this, the year during which the all-time record for homers in an MLB season will be broken, there has been no shortage of dominant starting pitcher performances. From Clayton Kershaw to Max Scherzer in the NL to Chris Sale and Corey Kluber in the AL, true greatness has been on display. In this space not too long ago, I dug a little deeper into the exploits of Dodgers lefty Alex Wood. Today, let’s do the same in the AL and give Mariner lefty James Paxton his due.

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Yonder Alonso is now a Mariner, and for a player that just added a ton of fly balls to his repertoire (and the power that comes with it), hopefully that change of scenery will be a salve. Because Alonso has lost those fly balls momentarily. He thinks he knows why.

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James Paxton had a pretty bad June. His season got off to a wonderful start, but then he landed on the DL, and shortly after his return, the calendar flipped and pitching was hard again. Paxton in June ran a 7+ ERA, and opponents blasted him to the tune of a .395 wOBA. Something appeared to be seriously wrong, but Paxton blamed his mechanics, and not his health. He found that he had some straightening out to do.

For me, one of the fundamental markers of greatness is the ability to adjust on the fly. It’s one thing to play well, but it’s quite another to play well, then struggle, then get back to playing well again. We’ve recently seen this with, say, Rich Hill. And, of course, we’ve seen this with Paxton. Paxton started six games in July, and he won each of them. He issued a total of just six walks, and he trimmed that .395 June wOBA almost literally in half. Paxton has gotten himself back on track, and I don’t know what more evidence people might need. James Paxton is extremely good. He is sufficiently proven.

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Below is a ranking of the prospects traded this month, tiered by our Future Value scale. A reminder that there’s lots of room for argument as to how these players line up, especially within the same FV tier. If you need further explanation about FV, bang it here and here. Full writeups of the prospects are linked next to their names. If the player didn’t receive an entire post, I’ve got a brief scouting report included below. Enjoy.
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When you think of Adrian Beltre, the first thought that comes to mind might just be his defense. In the early parts of his career, that was his bread and butter. He does, after all, rank 19th all-time in Def, and 10th since the color barrier was broken in 1947. By the time he retires, top 15 in Def is well within his reach.

And yet, Beltre is just as prolific as a hitter! He’s been one of the best players ever on both sides of the ball. Yesterday, he became just the 31st member of the 3,000-hit club. That’s pretty amazing. It’s pretty much an automatic ticket to the Hall of Fame (don’t worry, Rafael Palmeiro will get there some day via some Veteran’s Committee). Beltre also ranks 15th in doubles, 38th in home runs, 21st in total bases and 21st in extra-base hits.

He doesn’t rank quite as high in rate statistics — his .195 ISO ranks 308th out of 3,953 qualified players, for instance. That’s still really, really good, but it doesn’t stand out quite as much. But he has been really good for a really long time. And he’s still playing well. If he’s not at the top of his game, he’s pretty close, and doing a lot better than a lot of other players at the time of their 3,000th hit. Let’s take a look:
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The Mariners are a decidedly mediocre team. They are 51-52. They have averaged 4.7 runs per game and given up an average of 4.8 runs per game. Their BaseRuns record is actually one game worse than their actual record, but that’s pretty darn close. They are projected to win half of their remaining games. When you include baserunning, their offense is 15th in the majors. Their defense ranks 18th, three runs above average. Their starters rank 23rd in WAR and their relievers 21st.

In other words, nothing about this Mariners team says go for it, yet the team has dipped its toes in that water acquiring bullpen help in the form of David Phelps and a potential bottom-of-the-rotation starter in Marco Gonzales. Despite their mediocrity, there are rumors the Mariners will dive all the way in this season, attempting to acquire Sonny Gray. And, it does make a little sense.

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Thoughtless and bad editor Carson Cistulli overlooked this post when Chris Mitchell submitted it on Friday afternoon. That’s the reason it’s appearing on Tuesday.

The Mariners and Cardinals completed one-to-one swap of outfielder Tyler O’Neill and lefty Marco Gonzales on Friday. As Dave Cameron has pointed out, this represented a case of the Mariners trading away future upside for some much-needed, immediate rotation depth. A move of that type is understandable given the state of the Mariners’ rotation and their position in the Wild Card race, but KATOH thinks the gap in value between these two prospects is quite large.

Below are the projections for the three players whom the White Sox receive. WAR figures account for the player’s first six major-league seasons. KATOH denotes the stats-only version of the projection system, while KATOH+ denotes the methodology that includes a player’s prospect rankings.

*****

Tyler O’Neill, OF (Profile)

KATOH: 7.1 WAR (34th overall)
KATOH+: 6.0 WAR (52nd overall)

O’Neill elevated his prospect stock last season, when he slashed .293/.374/.508 at the Double-A level. But he’s had a tougher time at Triple-A this season, hitting only .244/.328/.479. Part of that, however, has to do with playing in a park that’s tough on right-handed hitters. Eric Longenhagen gave him a 50 FV over the winter and listed him as an honorable mention on his top-100 list.

O’Neil is a three-true-outcomes prospect who’s homered, walked, or struck out in over 43% of his trips to the plate this year. His power is his biggest strength, as he’s belted a remarkable 75 homers since the start of the 2015 season while also kicking in 76 doubles and triples. But all that power comes with a lot of strikeouts, as evidenced by his 27% strikeout rate this year.

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Heading into the year, the Mariners plan seemed to be to acquire as many low-ceiling middling prospects as they could find and throw them all at the wall, hoping one or two would help stabilize the back end of the team’s rotation. Over the last year and change, they’ve acquired and started Ariel Miranda, Dillon Overton, Chase De Jong, Chris Heston, Christian Bergman, and Ryan Weber. Thanks to a .220 BABIP, Miranda’s been a reasonable enough starter for the team, but most of the other guys made a few low-quality appearances and were then shipped back to Triple-A.

But the Mariners are apparently undeterred, and are trying this strategy one more time.

#Mariners acquire LHP Marco Gonzales from St. Louis for minor league OF Tyler O’Neill.

— Ryan Divish (@RyanDivish) July 21, 2017

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