Nobody would blame a rookie for being nervous in his MLB debut. An 0-fer is completely understandable and would have no bearing on the expectations for a player’s career.
But none of that seems to matter to this season’s crop of debutants.
Hitters making their debuts have been more productive this year than in any other year by multiple measures. It’s the year of the hard-hitting debut.
The results and context
With Yohandy Morales and Lazaro Montes on Tuesday, there have now been 15 players to homer in their regular-season debuts this year. That’s the most in a season in MLB history, surpassing 2022 (13).
Those homer-happy first-timers have combined for 19 home runs, also the most by players in games making their MLB debuts in a season. Our debuting players have totaled 49 RBIs, which is — you guessed it — the most in a season since RBI became official in 1920, according to the Elias Sports Bureau.
Lest this come off as merely a counting stat phenomenon, consider this. There have been 94 players with at least one plate appearance in a debut this season. That’s outside the top 50 totals in seasons since 1900. There were as many as 145 as recently as the 2022 season.
This isn’t about quantity. It’s quality. Further evidence to that point, from Elias: each individual component of the combined slash line by players making their regular season debuts this season is the highest since at least 1900. That’s a .320 average, .400 on-base percentage and .618 slugging percentage.
For context, there are four players in MLB history to play more than 175 games and finish with at least a .320/.400/.620 line for their careers: Ted Williams, Babe Ruth, Lou Gehrig and Josh Gibson. Four of the most legendary figures in our sport’s history.
That’s who rookies are emulating in their debut games this year. And no, we’re not equating individual singular games all combined to four Hall of Fame careers — players who maintained that line for thousands of games each. That’s nowhere near the same thing, of course. But it’s impressive nonetheless and fun.
The best of the best
As we said, there have been 94 batting debuts this year. 58 of them got at least one hit. We don’t have the space to recap all of them. But here’s a look at some of the most memorable.
The three homers: Discussion of stellar MLB debuts will start with Joshua Báez’s on Aug. 15 for years to come.
Báez became the first player in MLB history to hit three home runs in his MLB debut. There have been more than 23,000 players in MLB history, for context, and none had done this until Báez. The previous earliest into a career that a player recorded a three-homer game was in his 10th game, per Elias. That had been done twice, by Aristides Aquino on Aug. 10, 2019 and Bobby Estalella on Sept. 4, 1997.
The two-homer duo: Even a multi-homer debut is a rarity. Báez became just the ninth player in MLB history with at least two homers in his first career regular-season game, per Elias. Incredibly, it was the third time it happened this year, with Báez joining José Fernández on March 31 and Chase DeLauter on March 26 (after debuting in the postseason). Prior to this year, there were six instances: Trevor Story on April 4, 2016, J.P. Arencibia on Aug. 7, 2010, Mark Quinn on Sept. 14, 1999, Bert Campaneris on July 23, 1964, Bob Nieman on Sept. 14, 1951, and Charlie Reilly on Oct. 9, 1889.
The walk-off homer: Braden Montgomery had a storybook debut on June 9, hitting a walk-off homer. He became just the fifth player in MLB history to hit a walk-off home run in his MLB debut, per Elias. He joined Carlos Pérez on May 5, 2015, Miguel Cabrera on June 20, 2003, Josh Bard on Aug. 23, 2002, and Billy Parker on Sept. 9, 1971.
The Tigers duo: Entering this season, just one player in Tigers history had at least three hits, including multiple extra-base hits, in his MLB debut: Billy Bean in 1987. Then Kevin McGonigle did it in his debut on Opening Day with four hits, two of them doubles. On July 31, Max Clark had his own such debut, with three hits, including two doubles. The Tigers are the first MLB team since at least 1900 with two such debuts in a season.
The Opening Day tone-setters: Munetaka Murakami, JJ Wetherholt, Carson Benge and DeLauter all homered on Opening Day in their regular season debuts. It’s the only day in MLB history where at least three different players homered in their regular season debuts, per STATS.
The four-hit fiends: McGonigle had four hits, as noted above. Then on Aug. 5, Angel Genao became the 22nd player since 1900 with at least four hits in his MLB debut. This is the third season in that span with multiple four-plus hit debuts, along with 2010 (Arencibia, Wilson Ramos) and 1933 (Cecil Travis, Russ Van Atta).
The teenage phenom: At 19 years and 344 days in his debut on April 3, Konnor Griffin became the youngest player with a walk in his MLB debut since Aramis Ramirez, also for the Pirates, on May 26, 1998 (19y 335d). Griffin was the fourth teen with a walk and RBI in his debut (RBI official since 1920), joining 1963 John Paciorek, 1963 Rusty Staub and 1958 Johnny Callison.