u/Airforce987

Not only is that the most ever in Red Sox history through 40 games, it ties an MLB Modern-Era record if you exclude the 2020 season (Miami, St. Louis, and Houston each had over 10 that year). The 2024 San Francisco Giants, 2022 Cincinnati Reds, and the 1942 Boston Braves also had 7 pitchers debut in their first 40 games.

In those debut outings, the rookie pitchers have combined to post a 1.47 ERA (3 ER/18.1 IP), with a .164 opponent average (10-for-61) and 18 strikeouts.

As a group on the season, they have a 3.31 ERA (19 ER/51.2 IP) and 39 strikeouts, but if you remove Ryan Watson from the list as he has the bulk of those innings, it drops to a 1.45 ERA (5 ER/31.0 IP) with 24 K’s.

Granted, most of the debut games and opportunities for these guys have been low leverage situations, but still very impressive nonetheless.

Edit: forgot to mention who they actually are for those not aware: Jack Anderson, Jake Bennett, Alec Gamboa, Eduardo Rivera, Tyler Samaniego, Tyler Uberstine, and Ryan Watson