| Date | News | Comment |
| Jun 18 2024 | Mastrobuoni was called up from Triple-A Iowa on Tuesday. | ROTOWIRE RECOMMENDS: Mastrobuoni will return to the major-league roster after being sent down May 20, replacing Mike Tauchman (groin) with the Cubs after Tauchman was placed on the 10-day injured list Tuesday. Mastrobuoni produced a .264 average with three home runs, 14 RBI, 16 runs scored and four stolen bases over 87 at-bats in 22 games with Iowa since his demotion. |
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| May 20 2024 | Mastrobuoni was optioned to Triple-A Iowa on Monday, per MLB's transaction log. | ROTOWIRE RECOMMENDS: Mastrobuoni went 0-for-10 at the dish over his last three games, and he'll be demoted to the minors now that Dansby Swanson (knee) is ready to be activated from the 10-day IL and Luis Vazquez is ready to get a shot with the big-league club. Mastrobuoni will likely be seen again in the majors this season considering his versatility. |
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| May 15 2024 | Mastrobuoni will start at shortstop and bat sixth in Wednesday's game against Atlanta, Maddie Lee of the Chicago Sun-Times reports. | ROTOWIRE RECOMMENDS: With Dansby Swanson (knee) recently going on the injured list and with Nico Hoerner (hamstring) out of the lineup for the second day in a row, Mastrobuoni has been the main beneficiary from a playing-time perspective. He'll draw his fifth start in seven games Wednesday and could continue to see fairly steady playing time in the middle infield even if Hoerner avoids a trip to the IL. |
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| May 12 2024 | Mastrobuoni went 3-for-4 with a walk, a double, an RBI and two runs scored in Saturday's 10-9 loss to the Pirates. | ROTOWIRE RECOMMENDS: Mastrobuoni was productive from the No. 8 spot in the lineup and he recorded his first three hits of the season, as he came into the contest 0-for-14 across 10 games. The 28-year-old has bounced between Triple-A and the majors and serves in a utility role when he's with the Cubs, so he doesn't see a ton of regular playing time, which makes Saturday's performance an outlier. |
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| May 4 2024 | The Cubs recalled Mastrobuoni from Triple-A Iowa on Saturday. | ROTOWIRE RECOMMENDS: Mastrobuoni made the Cubs' Opening Day roster and was optioned to Triple-A Iowa on April 18 after Patrick Wisdom returned from a stint on the 10-day injured list due to a back injury. Mastrobuoni has appeared in 10 games for Iowa, slashing .231/.318/.436 with 10 runs, five doubles, one home run and four RBI over 44 plate appearances. Matt Mervis was sent down to Triple-A Iowa in a corresponding move. |
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