Below is an analysis of the prospects in the farm system of the Seattle Mariners. Scouting reports were compiled with information provided by industry sources as well as my own observations. As there was no minor league season in 2020, there are some instances where no new information was gleaned about a player. Players whose write-ups have not been meaningfully altered begin by telling you so. Each blurb ends with an indication of where the player played in 2020, which in turn likely informed the changes to their report if there were any. As always, I’ve leaned more heavily on sources from outside of a given org than those within for reasons of objectivity. Because outside scouts were not allowed at the alternate sites, I’ve primarily focused on data from there, and the context of that data, in my opinion, reduces how meaningful it is. Lastly, in an effort to more clearly indicate relievers’ anticipated roles, you’ll see two reliever designations, both on my lists and on The Board: MIRP, or multi-inning relief pitcher, and SIRP, or single-inning relief pitcher.

For more information on the 20-80 scouting scale by which all of our prospect content is governed, you can click here. For further explanation of Future Value’s merits and drawbacks, read Future Value.

All of the numbered prospects here also appear on The Board, a resource the site offers featuring sortable scouting information for every organization. It can be found here.

These are notes on prospects from Eric Longenhagen and Tess Taruskin. Read previous installments here.

Eric’s Notes (Games from May 12)

Cody Poteet, RHP, Miami Marlins
Level & Affiliate: MLB   Age: 26   Org Rank: 24   FV: 40 Line: 5 IP, 4 H, 2 R, 0 BB, 6 K

Notes
Poteet was a prospect several years ago, last on the Marlins list in 2017 (it was just 13 names long) as a potential backend starter. He had a two-tick velo bump during quarantine, and after sitting 89-93 and topping out at 95 in 2019, he’s sitting 92-95 and touching 96 now. He had a 10-strikeout start in his first 2021 minor league outing then was immediately promoted to the big league team for Wednesday’s start. It’s surprising that Poteet had such a late bump in velocity. His era of UCLA pitcher had already adopted Driveline principals, and I would have guessed he was already maxed out. Of his three secondaries, Poteet most-often deploys his changeup, a heavy, sinking offering in the 85-88 mph range. His slider has more linear movement than two-planed sweeping shape, but it can still miss bats if it’s located away from righty batters. His curveball has plus-plus spin rates but is easy to identify out of his hand since he has a sink/tail-oriented fastball, and Poteet hung a couple of them Wednesday, one of which got put into the seats. The limited utility of his breaking balls and his fastball being more of a grounder-getter than a bat-misser holds Poteet in the low-variance backend starter bucket for me. Read the rest of this entry »

Earlier today, the Seattle Mariners promoted Logan Gilbert and Jarred Kelenic to their active roster; both are expected to start in tonight’s game against Cleveland. The joint moves are the latest and most decisive steps to date in Seattle’s rebuild, and mark the next phase in the Mariners’ quest to construct a contender around a nucleus of homegrown talent.

This is undoubtedly a big day for the Mariners and their fans. As you probably know, the team owns the longest playoff drought in major American sports, a streak now in its 20th year. In those two decades of fits and starts, aborted tear-downs and calamitous collapses, Seattle has teased fans with young and talented rosters before. But while there’s never any guarantee that bluechip farmhands will live up to their billing, this era has a different feel to it. The current regime’s player development staff already has a few wins under their belt, and Seattle’s farm system is deeper than in previous rebuilding cycles, particularly when it comes to premium position players: In Kelenic and Julio Rodríguez, the Mariners have a pair of prospects with legitimate star potential.

There’s not much I can tell you about Kelenic that Eric Longenhagen hasn’t covered already. We have him as the game’s fourth-best prospect right now, a player who projects as a plus bat and one who may have muscled his way into plus power as well. Mariners fans will find much to salivate over in Eric’s full remarks, but as a brief teaser: “Kelenic rakes. His feel for contact, strength, and mature approach combine to make him a lethal offensive threat… I expect him to come up in 2021 and be an immediate impact player.” We’ll talk more about all of the learning and developing and maturing he did in his six games down in Tacoma later. For now, suffice to say that his spring and Triple-A appearances did nothing to damage his stock. Read the rest of this entry »

First, a bit of history:

The major league annals include just two players born in Slovakia. One of them is Elmer Valo, an outfielder for six teams from 1940-1961 who hailed from the village of Rybnik. The other is Jack Quinn (born Johannes Pajkos), a pitcher for eight teams from 1909-1933 who drew his first breaths 333 kilometers away in Štefurov. Both came to the United States at a young age, their families settling in the Pennsylvania.

Adam Macko hopes to follow in their footsteps, albeit via pathways. A native of Bratislava, Slovakia, Macko moved to Stoney Plain, Alberta, Canada when he was 12 years old — a year in Ireland bridging the Atlantic journey — and then to the southern part of the province where he spent three years at the Vauxhall Baseball Academy before being selected by Seattle in the seventh round of the 2019 draft.

Profile-wise, Macko is more finesse than power, albeit not by a wide margin. The 20-year-old called himself “a command lefty” when offering a self scouting report, but that belies a velocity jump that saw him clocked as high as 97 mph in spring training. In his first start of the season, Macko sat 92-96 with his four-seamer while hurling four scoreless innings for the Low-A Modesto Nuts. Mixing and matching effectively, the southpaw set down seven Stockton Ports batters on strikes. Read the rest of this entry »

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

Corbin Carroll, CF, Arizona Diamondbacks
Level & Affiliate: Hi-A Hillsboro   Age: 20   Org Rank: 1 (20 overall)   FV: 60
Line: 3-for-5, HR, 3B, BB, 2 SB

Notes
I’m going to bet Carroll goes to the Futures Game and ends up promoted to Double-A shortly after the showcase. He’s shown no signs of slowing down after looking like the best player in all of Arizona during 2020 instructs. This is the kind of player who’s going to out-produce his raw power in games because the quality of his contact is just so good. His homer yesterday (which tied the game in the ninth) was hit to the opposite field. It wasn’t like a lot of oppo bombs that rely on brute strength (think of Giancarlo Stanton’s right-center homers) or just happen to suit the swing path of someone with big power (Ryan Howard). Instead, Carroll just dove to try to cover the outer third of the plate and poked the barrel there, and he hit the bottom of the ball with the sweet spot of the bat. Read the rest of this entry »

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

Robert Hassell III, CF, San Diego Padres
Level & Affiliate: Low-A Lake Elsinore   Age: 19   Org Rank: 5   FV: 50
Line: 3-for-5, HR, 2B, BB, 2 SB

Notes
Perhaps the most important thing about Hassell’s first pro season will be how he looks in center field. His first step out there is pretty good, but he sometimes struggles to close the deal, especially when he’s approaching the wall. Hassell hit with substantially more power during 2020 instructs, then arrived to 2021 spring training (where he got a lot of run with the big league team) with a really steep, uphill swing, and I watched him swing through a lot of fastballs with lateral action during minor league spring training. Clearly games like last night are an indication that’s okay, I’m just noting there may be a contact-for-power tradeoff happening here based on my spring looks. Read the rest of this entry »

If you pull up the Statcast batting leaderboards and sort by hard hit rate, the number one player won’t surprise you; it’s Giancarlo Stanton with a full two-thirds of his batted balls hit harder than 95 mph this year. But if you set the minimum batted ball filter to 40 events, the third name on the list is quite surprising: Evan Longoria. The 35-year-old third baseman is putting up some of the most encouraging offensive numbers since his heyday in Tampa Bay. And if you look a little further down, another veteran third-baseman shows up: Kyle Seager, who is carrying much of Seattle’s offense on his shoulders. These two veterans are simply crushing the ball right now and are enjoying late-career resurgences to help their respective teams get off to hot starts in April.

Longoria more than Seager has struggled offensively in the recent past. Since being traded to San Francisco prior to the 2018 season, he’s put up a 93 wRC+ in three seasons, accumulating just 3.1 WAR. That’s a significant step back from the peak of his career when he was widely considered to be one of the best, most consistent third basemen in baseball. After three disappointing years in the Bay area, his Statcast batting profile looks completely different this year. He’s posting career highs in average exit velocity, barrel rate, and hard hit rate leading to the highest power output of his career.

Of course, if you’ve been paying attention to the conversations around the changes in the ball introduced this year, you’d know that nearly every batter is seeing higher exit velocities on their hardest hit balls in play. Here’s what Justin Choi wrote in early April:

“The pressing issue, though, is that inflated exit velocities on batted balls force us to view the improvements of hitters with a rather healthy dose of skepticism. So far into the season, many players have surpassed their previous max EV highs; to my knowledge, 19 of them did so by a margin of 2 or more mph. But how can we tell which of those power surges are genuine? Did they make mechanical adjustments, or are they beneficiaries of the new baseball?”

Read the rest of this entry »

With another full week of baseball on the horizon, let’s set our sights on three intriguing faceoffs. One is riddled with questions about each starter’s ability to become a true ace, another connects two former teammates who have each proven themselves as aces, and the final is between two fellas who haven’t proven much of anything yet this year.

Tuesday, April 20, 6:40 PM ET: Zac Gallen vs. Luis Castillo

For years, Gallen has embodied promise. He was, and in many ways still is, the physical form of “could be.” The Cardinals took him in the third round of the 2016 draft, and his 1.62 ERA and 2.17 FIP at High-A in 2017 showed quick returns on the their investment. Gallen made it all the way up to Triple-A by the end of the year, then was traded to Miami in December 2017 along with Sandy Alcantara and two other players in exchange for Marcell Ozuna. Read the rest of this entry »

We’re now about 10 days into the season, which means it’s time for a round of “Who’s looking good out of the gate?” Today, I want to focus on three post-hype starters who piqued my interest in the last week: Carlos Rodón, Jeff Hoffman, and Justin Dunn. Obviously, these three have teased before, and given their track records, there’s good reason to be skeptical of them going forward. All three have good arms though, and I’m a sucker for a spring breakout. With that in mind, I’ve donned my yellow zigzagged shirt, taken a running start, and am ready to blast this metaphorical football.

I trust that a small sample warning isn’t really necessary here. We all know that we’re working with extremely limited data at this point in the year, and that the following content comes with an extra-large SSS warning label. I trust you to recognize the intent of this article, which is simply to highlight interesting starts from a few talented but oft-frustrating arms. I’m not declaring that they’re suddenly budding All-Stars; I’m not even arguing they belong on your fantasy team. If someone reads this and comments “Uh, it was one start,” I will, well, I won’t do anything, but someone else will down-vote you in the comments, and that will be embarrassing. Don’t do that.

With that out of the way:

Carlos Rodón

Rodón’s run of bad luck in recent years is well-documented. He missed a couple of months in 2018 with a shoulder injury, then had to go under the knife for Tommy John early the following year. He returned to the mound last season, but only for a handful of innings, and he was unceremoniously non-tendered this past winter. Chicago invited him to camp anyway, and while he had a strong spring and won a job in the rotation, he didn’t have a ton of buzz heading into the season. Read the rest of this entry »

Prospect writers Kevin Goldstein and Eric Longenhagen will sometimes have enough player notes to compile a scouting post. This is one of those dispatches, a collection of thoughts after another weekend of college baseball, a prospect trade, and minor league co-op action in Arizona. Remember, prospect rankings can be found on The Board.

Kevin’s Notes

Waldy Arias, 3B, Campbell: 3-for-9, 3 BB, K, 2 SB, 2 HBP

If you are here for hardcore draft info, skip to the next paragraph. If you want to have fun for a minute, stick around. Arias is a little junior third baseman at a mid-major program who is slugging .290. Nobody is going to print a magnet with his name on it come July. My question is why does he have so many enemies? With two more hit by pitches over the weekend, Arias has now been hit 16 times in 21 games. That’s nearly once every six plate appearances, which was his exact rate last year, when he got hit 12 times in 15 games. Arias is a pesky slap hitter who crowds the dish. His high front elbow hangs out over the plate and the overall setup reminds me a bit of a mini-Carlos Quentin, who took a fair number of pitches to the body in his career. With access to some of the video and data tools pro teams have, I was able to click a few buttons and watch all 16 HBP. Here are the results:

1. Curveball: Foot
2. Slider: Leg
3. Fastball: Thigh
4. Fastball: Thigh
5. Slider: Foot
6. Fastball: Thigh
7. Fastball: Elbow
8. Fastball: Elbow
9. Slider: Head
10. Fastball: Elbow
11. Changeup: Shoulder
12. Fastball: Back
13. Slider: Elbow
14. Fastball: Elbow
15. Changeup: Hand
16. Slider: Shoulder

Read the rest of this entry »