clock menu more-arrow no yes mobile

Filed under:

2019 South Side Sox Prospect Vote: Round 23

A huge win for Laz Rivera as our No. 22 prospect. Now, who is the 23rd-best prospect in the White Sox system?

Laz Rivera batting with his back to the camera at the Sox spring training facility, a building with the Sox logo on it visible beyond right field
Magnum M.I.: In 2018, Rivera impressed with both bat and glove.
Kim Contreras (@CuAs)/South Side Sox

We started this out trying to get as many names as possible on the ballot, but that only worked for about a dozen rounds before the results started to get a little wonky — no offense, Lincoln Henzman. So we’re back to the traditional five players out for each round, with combined 2018 stats to help you out in your decision-making process.

As we count down the SSS Prospect Vote, we’ll be counting up the overall list of Top 100 Prospects, with the SSS poll vote counting as a voice in the order of our official SSS Top 100.

Here’s how last year’s prospect vote wrangled out — all 42 picks, with an archive of every article in the 2018 series.

A final note: All copy below the poll, unless otherwise noted, comes from wsm’s Deep Dive series. Credit due. YOTH is just running the numbers.

Sound cool? Now, get voting!

Voting results for Round 22

After a tight fight for No. 21, Laz Rivera destroyed the field to win the No. 22 slot, with 101 of 167 votes (60.5%). A year ago, Rivera was voted our No. 37 prospect.

Note on the table below: “Rounds” refers to the number of ballots on which a player has appeared.

2019 South Side Sox Prospect Vote Winners

More information on our polling.


Who is the 23rd-best prospect in the White Sox system?

This poll is closed

  • 7%
    Luis Curbelo
    (11 votes)
  • 36%
    Kodi Medeiros
    (54 votes)
  • 22%
    Konnor Pilkington
    (33 votes)
  • 23%
    Jordan Stephens
    (35 votes)
  • 10%
    Jonathan Stiever
    (15 votes)
148 votes total Vote Now

Luis Curbelo

Age 21
2018 SSS poll ranking 29
2018 High Level Kannapolis (A)
Overall 2018 stats 83 games ▪️ 3 HR ▪️ 31 RBI ▪️ .237/.282/.338 ▪️ 18 BB ▪️ 87 K

Curbelo began his high school career at the Puerto Rican Baseball Academy, and after performing well on the summer showcase circuit, he moved to Cocoa (Fla.) High as a senior to increase his exposure. At the time of the 2016 MLB Draft, Curbelo was the 33rd-ranked prep prospect in the country, according to PerfectGame. As a result, when he fell to the sixth round, the White Sox pounced and paid him an over-slot bonus of $700,000.

In his first two years of professional ball, with the AZL White Sox and Great Falls, Curbelo slashed just .242/.322/.354 with a combined three homers, 16 RBIs, four stolen bases, 16 walks (7.92%) and 46 strikeouts (22.77%) over 178 at-bats. Unfortunately, he missed plenty of development time in 2017 when he tore his meniscus after just three games with Great Falls.

When winning a promotion to Kannapolis this year expectations were tempered, with Curbelo coming back from such a serious injury. For the year, he managed to slash .237/.282/.338 with 19 doubles, three homers, 31 RBIs, 18 walks (5.25%) and 87 strikeouts (25.36 K%) over 317 at-bats. Curbelo’s hitting, especially his high number of strikeouts, is certainly disconcerting. Considering he was 1.3 years younger than league average, and he had relatively little professional exposure previously, the struggles were not entirely surprising. Perhaps of more concern may be on defense, where Curbelo committed 14 errors in 57 games at short, while also erring 10 times in 20 games at the hot corner.

Curbelo still has the build to hit for more power as he learns to adapt in the minors. Defensively, he needs to keep his focus and keep in front of the ball while trying not to rush things. Offensively, he’ll need to maintain better plate discipline, which often comes with experience. There’s a possibility Curbelo will be promoted to Winston-Salem, in order to be the club’s third baseman until Jake Burger is ready to take the helm; after all, Curbelo is the 27th-ranked prospect in the organization, according to MLB Pipeline. Otherwise, he could be competing for playing time next year at shortstop/third base with Lenyn Sosa and Bryce Bush.

Kodi Medeiros

Left-handed starting pitcher
Age 22
2018 SSS poll ranking N/R
2018 High Level Birmingham (AA)
Overall 2018 stats 7-7 ▪️ 27 games (22 starts) ▪️ 137 23 IP ▪️ 3.60 ERA ▪️ 141 K ▪️ 67 BB ▪️ 1.366 WHIP

When Medeiros finished his senior season with Waiakea H.S. (Hilo, Hawaii) with a 1.12 ERA, .178 OBA, and 16.7 K/9, PerfectGame ranked him as the sixth best prep prospect available in the 2014 MLB draft. Thus, it was no surprise when the Milwaukee Brewers selected him with their first round pick (12th overall). After receiving a $2.5 million signing bonus, Medeiros struggled with the AZL Brewers to the tune of a 7.13 ERA and 2.09 WHIP.

The following year, Medeiros bounced back somewhat with the Brewers’ A-affiliate Wisconsin, where he posted a 4.44 ERA and 1.28 WHIP in 93 1⁄3 innings, allowing 79 hits (.228 OBA) and 40 walks (10.0%) and striking out 94 (23.5%). However, he slid back in 2016 and 2017 for the Brewers’ A+ affiliates in Brevard County and Carolina, where in a combined 213 1⁄3 innings, Medeiros posted a 5.36 ERA, 1.56 WHIP, .266 OBA, 11.9 BB%, and 19.9 K%.

In 20 outings (15 starts) for AA Biloxi in 2018, Medeiros was enjoying his best minor league season to date — a 3.14 ERA and 1.31 WHIP over 103 1⁄3 innings, allowing just 90 hits (.234 OBA) and 45 walks (10.1%) while striking out 107 (24.0%). On July 26, Medeiros was traded along with right-handed pitcher Wilber Perez to the White Sox for closer Joakim Soria. After the trade, Medeiros struggled a bit in seven starts totaling 34 1⁄3 innings, posting a 4.98 ERA and 1.54 WHIP while allowing 31 hits (.250 OBA), 22 walks (14.5%) and 34 strikeouts (22.4%).

Medeiros currently ranks 19th among White Sox prospects according to MLB Pipeline. His fastball maxes out at 95-96 mph, with tailing action. He’s also got a plus slider which has a significant lateral break, and a solid changeup with good sink and fading action. However, he may have a more successful career as a closer for two reasons:

  1. He’s got a unique arm slot which makes it difficult for lefties to pick up: Lefties hit just .160 against him this year compared to .261 versus righties
  2. His control has been totally underwhelming: His career walk percentage in his four years of professional baseball is 11.4.

With that said, expect Medeiros to return to the Birmingham rotation to begin 2019.

Konnor Pilkington

Left-handed starting pitcher
Age 21
2018 SSS poll ranking N/R
2018 High Level Great Falls (Rookie)
Overall 2018 stats 3-8 ▪️ 34 games (32 starts) ▪️ 130 23 IP ▪️ 5.03 ERA ▪️ 129 K ▪️ 43 BB ▪️ 1.462 WHIP

Pilkington had been considered one of the top collegiate southpaws in the country, since the beginning of his playing days with Mississippi State. After his solid sophomore season and terrific runs in the Cape Cod League and Team USA in 2017, Pilkington’s star couldn’t have shone brighter. In that sophomore season, he posted a 3.08 ERA and 1.14 WHIP in 108 innings, allowing just 76 hits (.199 OBA) and 47 walks compared to 111 strikeouts.

However, in 2018 with the Bulldogs, Pilkington compiled a 4.47 ERA and 1.35 WHIP over 102 2⁄3innings, as he allowed 106 hits (2.69 OBA) and 33 walks compared to 107 strikeouts. As a result of his junior slump, which saw him slip from 96 to 92 mph on the radar gun, he fell to the third round of the draft, where the White Sox were happy to snap him up with a $650,000 signing bonus.

Pilkington struggled during his eight starts with AZL and Great Falls after signing. In a small sample size totaling 14 innings, he surrendered 21 hits (.344 OBA), five walks (7.4%) and 11 strikeouts (16.2%) while posting a 7.07 ERA and 1.86 WHIP.

According to MLB Pipeline, Pilkington’s delivery got off-line for much of the time this season, which caused a decline in velocity. He worked mostly at 88-91 mph and topped out at 93 this spring, but he has reached 96 mph in the past and still succeeds at lower velocities because his size and high three-quarters arm slot create a steep downhill plane. He has good feel for his advanced change, and also uses a slider that can get slurvy at times. MLB Pipeline currently ranks Pilkington 19th among White Sox prospects, and he should begin next season in pitcher-friendly Kannapolis.

Jordan Stephens

Right-handed starting pitcher
Age 26
2018 SSS poll ranking 18
2018 High Level Charlotte (AAA)
Overall 2018 stats 8-10 ▪️ 28 starts ▪️ 146 23 IP ▪️ 4.23 ERA ▪️ 139 K ▪️ 54 BB ▪️ 1.398 WHIP

Stephens, a native of Alvin, Texas, played college ball for the nearby Rice Owls. He was considered by many scouts at the time of his junior season to be a possible third-round pick. However, three starts into that season, Stephens was injured and required Tommy John surgery, missing the remainder of the season. Thus, Stephens returned to Rice for his senior season and pitched surprisingly well: 3.17 ERA and 1.14 WHIP over 59 2⁄3 innings, allowing just 51 hits and 17 walks (2.56 BB/9) while striking out 75 (11.31 K/9). Due to his competitiveness and the results he posted during his four-year stint with Rice, Stephens was selected in the fifth round of the 2015 MLB draft — ultimately receiving a signing bonus of $300,000.

Stephens’ results had been solid from 2015-17, moving through the White Sox system quite rapidly while striking out more than one batter per inning and maintaining solid peripheral numbers in the process. He missed the first two months of 2017 with forearm tendinitis but still pitched effectively, with a 3.14 ERA and 1.30 WHIP over 91 2⁄3 innings, allowing 84 hits (.249 OBA) and 35 walks (3.44 BB/9) while striking out 83 (8.15 K/9).

In 2018, after a return to Birmingham for seven blistering starts, Stephens was promoted to Charlotte, where he struggled a bit. For the Knights in 21 starts (107 innings), Stephens posted a 4.71 ERA and 1.46 WHIP — allowing 114 hits (.271 OBA) and 42 walks (3.53 BB/9) while striking out 99 (8.33 K/9). Lefties hit .296 against his offerings at AAA, while righties hit just .242, and a similar differential occurred with Birmingham as well.

Stephens’ top pitch is an excellent, upper-70s curveball with good depth. While his fastball isn’t overpowering, the low-90s velocity is still effective because of the way he hides and locates it. He also has a cutter and changeup, which still need work due to his lack of results against lefties.

Because of issues Stephens has had staying healthy both in the college and professional levels, and due to his relatively small size and bulldog mentality, a switch to the bullpen may eventually be in order. At this moment, unless the White Sox acquire additional starters via trade or free agency, Stephens will be competing against the likes of Dylan Covey, Manny Banuelos, Spencer Adams and Jordan Guerrero in spring training for back-end spots in the rotation. The fact that the White Sox chose to add him to the 40-man roster this month, over the likes of both Adams and Guerrero, indicates he has the inside track on a rotation spot in 2019.

Jonathan Stiever

Right-handed starting pitcher
Age 21
2018 SSS poll ranking N/R
2018 High Level Great Falls (Rookie)
Overall 2018 stats 5-7 ▪️ 29 starts ▪️ 128 IP ▪️ 3.59 ERA ▪️ 136 K ▪️ 41 BB ▪️ 1.234 WHIP

After a great freshman season for the Indiana Hoosiers as a reliever, Stiever was converted to a starter for his sophomore and junior seasons. In his three years overall, he attained a 3.56 ERA and 1.21 WHIP over 217 2⁄3 innings with a .264 OBA, 1.90 BB/9 and 7.61 K/9. His junior season was the best overall, as he worked 100 innings with a .250 OBA, 2.87 BB% and 8.70 K%. As a result of his success, Stiever was drafted in the fifth round of the 2018 MLB draft by the White Sox and received a $386,800 at-slot bonus.

Because Stiever had already attained a career high in innings with the Hoosiers, his innings were severely limited at Great Falls. In 13 starts totaling 28 frames, he maintained a 4.18 ERA and 1.14 WHIP despite working in a difficult pitching environment. In those 28 innings, Stiever ceded only 23 hits (.223 OBA) and walked just nine (2.89 BB/9) while striking out 39 (12.54 K/9). His fastball typically runs from the low 90s to 96 mph, but has good running and sinking action. Stiever has an upper-70s spike curveball which also features slider action, and an above-average changeup, which helped limit lefties to an OBA of .250. Stiever currenly ranks 29th among White Sox prospects according to MLB Pipeline, so expect him to begin next season with Kannapolis.