| Date | News | Comment |
| May 12 2025 | The Cubs optioned Hollowell to Triple-A Iowa on Monday. | ROTOWIRE RECOMMENDS: He'll cede his spot on the 26-man active roster and in the bullpen to left-hander Caleb Thielbar (personal), who was reinstated from the paternity list. Hollowell has fared well over his five appearances for the Cubs between his two separate stints in the big leagues this season, giving up just one earned run and striking out five batters across 6.1 innings. |
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| May 5 2025 | The Cubs recalled Hollowell from Triple-A Iowa on Monday, Maddie Lee of the Chicago Sun-Times reports. | ROTOWIRE RECOMMENDS: Chicago placed ace Shota Imanaga (hamstring) on the 15-day injured list in a corresponding move, but Hollowell won't be a candidate to replace him in the rotation and will instead slot into a low-leverage role in the bullpen. Hollowell made one relief appearance for Chicago earlier this season, tossing two scoreless frames April 22 against the Dodgers. |
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| Mar 1 2025 | The Cubs optioned Hollowell to Triple-A Iowa on Saturday, Jared Wyllys of AllCHGO.com reports. | ROTOWIRE RECOMMENDS: Hollowell made just one appearance for the Cubs during Cactus League play, allowing one run on two hits while striking out two batters over one inning. He'll work as bullpen depth in the minors to open the new season. |
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| Sep 24 2024 | The Cubs optioned Hollowell to Triple-A Iowa on Tuesday, Meghan Montemurro of the Chicago Tribune reports. | ROTOWIRE RECOMMENDS: He was just called up Monday but will be sent back down to make room for waiver claim Enoli Paredes, who has officially joined the active roster. Hollowell had a 1.1-inning scoreless relief appearance during his lone day with the big club. |
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| Sep 23 2024 | The Cubs recalled Hollowell from Triple-A Iowa on Monday, Sahadev Sharma of The Athletic reports. | ROTOWIRE RECOMMENDS: Hollowell was claimed off waivers from the Diamondbacks in August and will now get his first stint in the majors with the Cubs. The 26-year-old holds a 4.94 ERA and 45:21 K:BB across 31 innings this season at the Triple-A level. |
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| Aug 23 2024 | The Cubs claimed Hollowell off waivers from Arizona on Friday and optioned him to Triple-A Iowa, Paul Sullivan of the Chicago Tribune reports. | ROTOWIRE RECOMMENDS: Hollowell was designated for assignment by the D-Backs on Tuesday and will get a fresh start within the Cubs organization. The 26-year-old logged a 3.63 ERA across 17.1 innings for Arizona's Triple-A affiliate and hasn't pitched in the majors this season. David Bote was DFA'd to clear up room on the 40-man roster. |
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| Jul 3 2024 | The Diamondbacks optioned Hollowell to Triple-A Reno on Wednesday. | ROTOWIRE RECOMMENDS: Hollowell joined the big-league club Tuesday, but he'll now return to the minors without appearing in a game for the D-backs. Cristian Mena will take Hollowell's place on the active roster and start Wednesday's game versus the Athletics. |
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| Jul 2 2024 | The Diamondbacks recalled Hollowell from Triple-A Reno on Tuesday. | ROTOWIRE RECOMMENDS: The right-hander was optioned to Reno after being claimed off waivers from the Rockies in mid-June, and he'll now receive his first look with the Diamondbacks. Hollowell made 26 appearances in the big leagues last year for Colorado and had a 5.88 ERA, 1.46 WHIP and 32:18 K:BB over 33.2 innings. |
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| Jun 18 2024 | Hollowell was claimed off waivers by the Diamondbacks on Tuesday and was optioned to Triple-A Reno. | ROTOWIRE RECOMMENDS: Hollowell will enter the D-Backs' farm system after being part of the Rockies' organization since 2021. He's made 32 MLB appearances with Colorado, posting a 6.20 ERA and a 40:22 K:BB across 40.2 innings. He missed all of May with an unspecified injury but has made four appearances since being reinstated from the IL. |
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