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

Nate Eaton

Call me biased. Call me crazy. Call me shortsighted. But utilityman Nate Eaton makes too much sense for Royals fans to ignore.

Let's play a game. Pick which Omaha player you'd rather call up.

Player A: .289/.357/.493, 116 wRC+, 8.8% BB%, 26.9% K%, 5 HR, 24 RBI, 8 SB
Player B: .328/.371/.552, 135wRC+, 6.3% BB%, 18.9% K%, 5 HR, 28 RBI, 9 SB
Player C: .236/.319/.412, 87 wRC+, 11.2% BB%, 30.3% K%, 7 HR, 24RBI. 8 SB

Think about it. Do you have any guesses as to who it is? Here are the answers.

Player A: Drew Waters
Player B: Nate Eaton
Player C: Nick Pratto

Eaton is not getting the credit his 2024 production deserves. Many Royals fans likely wrote him off due to his abysmal start in 2023, where he reached base only six times in 56 plate appearances. He started 2023 on the 26-man roster, but spent much of the season in Omaha. The Royals designated Eaton for assignment following the season while shuffling their 40-man roster. He cleared waivers and returned to the team that drafted him in the 2018 MLB Draft's 21st round.

The numbers jump off the page, but Eaton's speed and positional versatility should pave his way back to the 40-man roster. He has played at least 55 innings at each outfield spot while also logging 19 innings at third base. He began his professional career as a second baseman, with little experience at first. Can you think of a speedy, versatile player that the Royals might need to replace eventually? I can.

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.

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