Justin Mason’s Baseball Chat – August 31, 2026
Here is today’s chat transcript:

On Saturday, Sal Stewart hit his 30th HR and Sarah Langs pulled yet another fun stat:
Sal Stewart is the 14th rookie in MLB history with 30+ homers and 100+ RBI in a season the 9 previous players to do it since the rookie of the year award began (1947) all won it
— Sarah Langs (@slangsonsports.bsky.social) 2026-08-29T19:07:32.184Z
That sent me scampering to the FanGraphs Rookie Leaderboards where you would see that Stewart, for all the fun counting stats, is the 7th best offensive rookie by fWAR (and is behind some (pitchers, as well), and the 9th best by wRC+.
But this article isn’t about Stewart, it is about the two fine young gentleman who top that wRC+ rookie leaderboard Esmerlyn Valdez and Munetaka Murakami. There are no many debuts more fun that those two. Murakami is going to have 30 HR any day now (I am writing Saturday, so maybe he already does?) and Valdez is on pace for 40, if only it were for those pesky months in Triple-A.
But Murakami and Valdez share something beyond prodigious power: a prodigious inability to make contact.

Welcome to the Daily SP Chart, click here if you’re new to get an idea of what I’m doing with these rankings.
—

I sat down to write this article at the start of the Cubs-Reds game on a sunny Sunday afternoon. It matched my disposition. Earlier in the day, I’d clinched an enviable first round bye in my home league. But the final game of the day was a game of consequence for a few of my league mates in a less privileged playoff position.
Their two teams were separated by just a game in our head-to-head categories league.
Both were in matchups where Cubs hitters had the chance to make or break their seasons. A run scored by Michael Busch or Nico Hoerner would send a surging Cinderella story packing and let a team that looked to be a shoo-in a few months ago limp into the playoffs. A stolen base by Ian Happ would have had the same effect, but was not really much of a consideration.
| 7:30 |
: Welcome
|
| 7:31 |
: Here are the winning bids in the two 15-team Tout Wars redraft leagues.
|
| 7:31 |
:
|
| 7:31 |
: hi jeff tnx as always. who do you project to be better ROS, carrigg or p. ramirez?
|
| 7:32 |
: Carrigg, lots of home games.
|
| 7:32 |
: john peck any good?
|

Rhona Wise-Imagn Images
In this article, I cover the players using CBS’s and Yahoo’s ADD/DROP rates. Both sites have the option for daily and weekly waiver wire adds. CBS uses a weekly change while Yahoo looks at the last 24 hours. Yahoo is a great snapshot of right now, while CBS ensures hot targets from early in the week aren’t missed. I start players being added at CBS who started the week on less than 40% of rosters.
The players are ordered for redraft leagues by my rest-of-season preference, grouped by hitters, starters, and relievers. Read the rest of this entry »

Pablo Robles-Imagn Images
Note: Any noted rostership rates come from the NFBC RotoWire Online Championship, the same rates we use on the FanGraphs Player Rater. For reference, these leagues are 12-team Roto leagues with 30-man rosters (2 C, 1B, 2B, SS, 3B, MI, CI, 5 OF, UT, 9 P) and weekly add/drops. This rate can be compared to other rostership rates found in this article.
Angels
• Over the last six games, Vaughn Grissom moved up to hit either third or fourth.
• Jose Siri (vs LHP) and Gustavo Campero (vs RHP) were in a platoon, but Campero is now on the IL, so Siri may get full-time at-bats.
• Christian Moore (.639 OPS since being recalled) started five straight games at second base. Read the rest of this entry »

THOMAS CORDY/PALM BEACH POST / USA TODAY NETWORK via Imagn Images
I thought I’d had a smart idea. I wanted to see how “dead” affected a league’s standings as the season drew to a close. With managers quitting their teams for various reasons, I wanted to see how the rate stats for underperforming teams changed. The counting stats needed to move up or down the standings are easier to calculate for each league, but rate stat movement is a bit of a mystery. I expected the bottom teams to go after counting stats and ignore their ratio categories. They did not. Instead, I verified regression remains unbeaten … probably.

Welcome to the Daily SP Chart, click here if you’re new to get an idea of what I’m doing with these rankings.
Pardon me for no Thursday board. I was light on sleep Wednesday night and then crashed after my morning stream. I will have some comments in the morning on Friday’s star-studded board.
—