KC Royals Roster: Predicting the next three Kansas City 40-man additions

One of the oldest accepted baseball truths is that no team will end a season with the same 40-man roster that it began with. Don't believe that? It has already happened on the KC Royals 40-man roster. Pitcher Matt Sauer is back in the New York Yankees organization, while relievers Sam Long and Tyler Duffey are two other new 40-man additions that Royals fans have seen this season.

The KC Royals have a plan. What could it be?

The MLB season is not even halfway over, with plenty of baseball left to play and all the variables that come with it. The summer sun melts players, and the arduous season exacerbates those lingering injuries. MLB teams have large staffs of people devoted to player health and recovery, but even they can only do so much. Freak moments, like outfielder Kyle Isbel's foul ball to the face, or sudden injuries, like superstar Ronald Acuña Jr.'s ACL tear, are just two reasons the transaction wire keeps humming.

That doesn't even take into consideration instances where players simply underperform. Utilityman Garrett Hampson and reliever Will Smith drew the ire of Royals fans earlier this season, calling for their jobs. Both players settled in this month, but they are still on fans' hot lists. They will not, and are not, the only struggling Royals in 2024. There will come a time when the organization's patience and coaches' trust run out. 

When that time comes, no matter the circumstance, Kansas City's organizational depth will be tested. Fans already saw that once, when Jonathan Bowlan and Daniel Lynch IV filled in for Alec Marsh across two starts. But both of those players were already on the 40-man roster, so calling them up was not a high-stakes move. My interest lies in a more extreme decision that Kansas City will likely make eventually.

Which players make sense to join, or re-join, Kansas City's 40-man roster in the near future? But, more importantly, why do they fit and deserve that distinction? Let's look at three strong options.

Walter Pennington

We have seen the social media chatter about reliever Walter Pennington. There are several biographical reasons why the 25-year-old should be dismissed. A 2020 undrafted free agent. A Colorado School of Mines alum. A soft-tossing lefty in a high-velocity world. Despite his untypical profile, Pennington is one of Kansas City's and Triple-A's best minor-league relievers.

The lefty received his first major league spring training invite this year, a reward for his impressive 2023 season. He started off in Double-A Northwest Arkansas, making eight appearances and pitching 9⅔ innings. In that span, he made light work of the competition, allowing only four hits and no runs. A Triple-A promotion upped the ante, but Pennington was up for the challenge.

On May 3, they promoted Pennington to Omaha, where he made 41 appearances and went 7-2 with a 3.69 ERA in 61.0 innings pitched. He did not duplicate his Double-A dominance but still showed promise. He finished the season strongly, pitching five innings without allowing a hit or a run in his last two games. 

He picked up this season right where he left off, and then some. He is currently achieving career-high strikeout rates at 38.2% and low walk rates at 9.2%. Omaha has called upon Pennington to be versatile, making both single-inning and multi-inning appearances this season. He even had a four-inning start on May 11, allowing no runs while striking out six. When Duffey's time was up, Pennington was a sensible replacement. Alas, Long got the call, and Pennington remains in Omaha. 

Valid concerns exist regarding how Pennington's pitch arsenal will perform at the next level. He primarily throws a cutter and slider, both of which average well below 90 mph. He mixes in a sinker that doesn't have much movement but has some higher velocity. Pennington doesn't focus on throwing many pitches in the strike zone; instead, he counts on batters swinging at his slider outside the zone.

The results are hard to ignore, despite some red flags. If Kansas City must seek a reliever beyond the 40-man roster, Pennington should still be considered for selection. If Long or even Smith struggle down the stretch, swapping them out for Pennington makes sense.

Logan Porter

This should not come as a surprise. We are at the point in catcher Logan Porter's career where he is no longer an unknown, no longer an underdog waiting for his story's climax. He made his long-awaited MLB debut late last year and appeared in 11 games while injuries limited Salvador Perez and Freddy Fermin.

Kansas City designated him for assignment following the season, making room for reliever Will Klein and outfielder Tyler Gentry. Like Eaton, Porter cleared waivers, returned to Kansas City, and received another spring training invite. This was his third consecutive invite to spring training for the Royals, who signed him as an undrafted free agent in 2018.

The righty produced at the plate in spring training, but remained off the 40-man roster and in Omaha. Kansas City carried three other catchers on the 40-man roster, along with Perez, Fermin, and veteran Austin Nola. Porter shouldn't be taking Perez's or Fermin's job anytime soon, but he is outplaying Nola by a wide margin.

Porter remains an on-base machine, walking 16.5% of the time while posting a .329/.447/.612 line. He has reached base safely in 22 of his 24 games this season. Porter proved his approach carries to the MLB level, where he reached base safely in 8 of his 10 games with a plate appearance last season. Additionally, Porter is experiencing a power spike for the Storm Chasers, with 13 extra-base hits while only striking out 21.4% of the time. 

Porter was a tweener, moving between first base and catcher, for much of his professional career. Kansas City used him exclusively as a catcher, and that trend continues in 2024. He is comfortable behind the plate and shows off his arm strength plenty.

Nola isn't staying healthy this season or producing to the point of warranting his 40-man roster spot. Porter does that, and then some. Even if he is just an emergency option, Porter is the better choice. Fermin and Perez are both playing more this season, and that increases their individual injury chances. Kansas City needs a quality third option behind the dish, and that is certainly Porter.

More from Kings of Kauffman