The Rockies are selecting reliever John Curtiss onto the MLB roster and designating left-hander Ty Blach for assignment, per Thomas Harding of MLB.com. Colorado will recall righty Jake Bird to take the bullpen spot vacated by the Nick Mears trade and bring up Tanner Gordon as the 27th man for Saturday’s doubleheader against San Francisco.
Blach, 33, has pitched in parts of seven MLB seasons and spent each of the past three years with the Rockies. He’s split time between the bullpen and the rotation in a swing role ever since the club selected him to the roster back in April but has struggled badly in the role with a 6.36 ERA and a 5.72 FIP in 63 2/3 innings of work. While Blach has walked just 5.4% of batters, he’s struck opponents out at a paltry 11.5% clip and has struggled badly to keep the ball in the park with nearly two homers allowed per nine innings this year. Those numbers are worse than even his prior difficult seasons with Colorado, where he posted a combined 5.66 ERA with a 4.99 FIP in 122 1/3 innings of work between the 2022 and ’23 campaigns.
While the lefty was once a solid swingman for the Giants early in his career, posting a 4.36 ERA and 4.14 FIP in 299 1/3 innings of work from his debut in 2016 to the end of the 2018 season, he’s struggled to keep a role in the big leagues since then with a cumulative 6.81 ERA in 51 appearances from 2019 onward. Assuming the Rockies don’t work out a trade involving Blach prior to the upcoming deadline on Tuesday, they’ll attempt to pass him through waivers at some point in the next seven days. Should he go unclaimed, they’ll have the opportunity to outright him to Triple-A, but he could reject that assignment in favor of free agency should he so choose.
Joining the 40-man roster in Blach’s place is Curtiss, who already appeared in a Rockies uniform for the first time earlier this year. The righty appeared in a game between Colorado and Philadelphia back in May but struggled badly in the appearance, allowing two runs on three hits while recording just one out. Prior to that earlier stint on Colorado’s 40-man roster, Curtiss was a journeyman reliever who had previously pitched for the Twins, Angels, Rays, Marlins, Brewers and Mets across parts of six seasons in the majors. He’s mostly posted solid results in that time with a 3.81 ERA and 3.98 FIP in 106 1/3 innings of work entering the 2024 season.
Most of that success came in Florida, as he posted an excellent 1.80 ERA in 25 innings with the AL champion Rays during the shortened 2020 season before heading to Miami in 2021 and delivering a 2.48 ERA in 40 frames for the club that year. He’s struggled since leaving the south, however, with eight runs (six earned) allowed during a 4 1/3 inning stint with Milwaukee late in the 2021 campaign and a 4.58 ERA in 15 appearances for the Mets last year before his rough outing with the Rockies back in May. Going forward, Curtiss seems likely to be used in middle relief alongside Bird, Peter Lambert and Justin Lawrence for the Rockies.
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