Bowman Spotlights: The Callup Board, September Edition

A three homer debut, a five hundred dollar spike, and a round trip back to earth. The board has its defining story.

The last board went up August 6, right after Max Clark and George Lombard Jr. debuted. Since then another wave graduated, including the two names this update is really about: Joshua Báez, who did something no player in MLB history had ever done, and Walker Jenkins, whose market did something almost as strange by doing nothing at all. Rosters expanded September 1, Ethan Salas is reportedly on his way up, and it felt like the right moment to reprice everything.

The short version: the fade is still the base case, but this month gave us the single best exhibit for selling the debut that this season has produced. More on Báez below.

The updated board

Same cohort rules as before: every 2026 debut with a Bowman 1st auto that traded before the callup, plus the new names since. "Debut $" is the raw price through the callup window. "Aug 6" is where each sat on the last board. "Now" is September 1. The right column is measured against the debut, because that's still the number the playbook is trying to beat.

One housekeeping note: Gabriel Rincones Jr. comes off the board this month. His market has gone quiet enough that I don't have a price I trust for him.

The pattern reads the same as June, July, and August. Griffin is now 52 percent under his debut. Snelling is down 83. Jacob Gonzalez is down 80. The mid-table churns a little (Bolte and Benge both bounced this month, Valdez gave most of his run back), but the wall of down arrows is intact. The exceptions live at the top of the new columns, and they earned their sections.

Joshua Báez

Three home runs in his first three at-bats. Nobody had ever done it. His card did a full round trip anyway.

Báez homered on the first big league pitch he saw, a 449 foot shot to dead center at Wrigley. Then he homered in his second at-bat. Then he came up in the sixth and became the first player in MLB history to homer in his first three career at-bats. Three for four, five RBIs, 30 family members in the stands. You cannot script a better debut.

Now here's what his card did. Báez was a $104 raw auto through the callup window. On debut night, sales printed at $500, twice, with $450, $425, and $399 sales the same evening. Two weeks later he's back at $100 raw. The greatest single debut performance in the sport's history bought his card roughly five times its price for about a day, and then the market went right back to where it started.

If you have been reading these boards all season, you know I keep saying the debut window is the exit. I did not expect the season to hand me an example this clean. A collector who listed into that Saturday night made five times what the card was worth Friday and five times what it's worth today. That's the whole playbook in one weekend.

Walker Jenkins

The opposite story: a top-15 debut the market fully ignored.

Jenkins got the full Target Field moment on Friday night: standing ovation before his first pitch, a 380 foot warning track flyout two pitches later, and his first big league hit in the same game. The Twins' top prospect, up for good, batting ninth and playing center.

His card's reaction: nothing. $161 into the callup, $161 through the debut, $161 now. After a summer of watching Báez quintuple for a night and Lombard's slabs double, a dead flat debut for a top-15 prospect is genuinely strange. Part of it is that Jenkins spent all season at Triple-A, so the callup was priced in for months. Part of it might just be a market that has watched every expensive debut this year bleed out and has stopped paying the hype tax. Either way, nobody who bought the callup got burned here, because nobody showed up to buy it.

I own Jenkins. I'm selling a few pieces into the window, flat pop or not, because that's the playbook and I don't make exceptions for guys I like. But the snack pack parallels are core PC and they aren't going anywhere. He's a forever collect for me, so the plan is what it always is: trim to the keepers, hold the keepers.

Kade Anderson

The top pitching prospect in baseball debuted with five strikeouts and a walk-off behind him.

Anderson went third overall last summer, won a national championship at LSU, carved through the minors in barely a year, and debuted at T-Mobile Park against a good Cubs lineup: 5.2 innings, five strikeouts, cruising, and then home runs on his final two pitches. The Mariners walked it off behind him anyway. Rank 5 on my board, and the best pitching prospect in the sport.

The market paid up into the callup, $231 through the window, and he's already given back 19 percent at $187. That's the standard pitcher pattern on this board (Schultz, Jump, Snelling, and Painter are all down 40 to 83 percent), just starting from a much higher floor because of who he is.

I never owned Anderson. Missed the chance on him, and at these prices my pitcher rule does the deciding for me: small swings on arms under $50, and $187 is not a small swing. If he's the exception to the pitcher fade, I'll be watching it from the sidelines.

Clark and Lombard, one month later

The August exceptions are still the exceptions.

Last month I said the graded market had already decided Clark and Lombard were different from the rest of the board, and the question was whether the spikes would hold. They held, and then some.

Lombard is the bigger move. In August his PSA 10 had nearly doubled while the raw sat flat at $173, and I wrote that the raw was understating him. The raw has since run to $271, up 57 percent on his debut, and the PSA 10 sits around $825. Clark is at $264 raw, up 28 percent on his debut, holding the whole spike a month later. They are the only two names on the original board meaningfully above their callup price, and both keep producing in the majors.

No position in either for me. That hasn't changed, and at these levels the buy window I'd have wanted is long gone. But honesty matters on a board like this: two names beat the playbook this summer, and these are the two.

Ethan Salas is next

Rosters expanded September 1 and Salas is reportedly on his way up to the Padres after hitting .326/.410/.539 across 24 Triple-A games. He caps off an excellent season: after coming back from injury he's done everything you would want to see and shown a bit more power potential along the way. Triple-A was no issue for him.

He's already one of the Bowman success stories of the year, from around $30 in the offseason to $131 now, and he's likely to see a nice debut bump. A 20 year old catcher with his pedigree debuting in September is exactly the kind of card this board exists to track, and after the Báez weekend you know what I think the play is if the bump comes. He'll be on the next board with a debut price next to his name.

What I'm doing

Selling into windows, same as all season. The Báez round trip is the argument in its purest form: the debut is the exit, even when the debut is the greatest in the sport's history. Jenkins showed the other failure mode, where the pop never comes at all, and the seller who waited for it got nothing extra for waiting. Clark and Lombard are real exceptions and I'm fine having watched them from the sidelines, because the board says the exceptions are two names out of forty.

I'll run this again when the September class graduates, with Salas at the top of the new column.

Track every name on the HobbyMonitor Prospect Dashboard.

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This is not financial advice. These are cards. The data and analysis are here to inform. You make your own calls.

This article was generated with the assistance of AI and reviewed before publishing. Always verify latest market data, stats, or news.

Published: September 2026