The Colorado Rockies placed right-hander Tomoyuki Sugano on the 15-day injured list on Saturday due to back spasms.
He was scheduled to start Saturday's game against the visiting San Francisco Giants. The move was retroactive to Wednesday.
Rookie left-hander Sean Sullivan was recalled from Triple-A Albuquerque and started Saturday's game in Denver in place of Sugano.
In other moves, Colorado placed right-hander Seth Halvorsen (right shoulder inflammation) on the 15-day IL, retroactive to Wednesday,
and selected the contract of right-handed reliever and two-time All-Star Jordan Romano from Albuquerque.
Sugano, 36, went unbeaten in five June starts, going 4-0 with a 6.58 ERA. His team gave him a combined 40 runs of support in those four wins.
He is 8-4 with a 4.80 ERA, 23 walks and 48 strikeouts in 84 1/3 innings over 16 starts in his first season with the Rockies. He made his major league debut in 2025 with the Baltimore Orioles and went 10-10 with a 4.64 ERA in 157 innings over 30 starts.
Sullivan, 23, walked away with a no-decision on Monday after allowing five runs on six hits in 4 2/3 innings against the Miami Marlins. He entered Saturday 0-2 with an 8.64 ERA, nine walks and 12 strikeouts over 16 2/3 innings in four starts for Colorado this season.
He was 5-3 with a 5.60 ERA, 19 walks and 50 strikeouts in 54 2/3 innings over 11 starts at Albuquerque. The Rockies selected Sullivan in the second round of the 2023 draft out of Wake Forest.
Halvorsen, 26, is 0-1 with a 4.74 ERA, 15 walks and 17 strikeouts in 19 innings over 21 relief appearances this season. Colorado selected Halvorsen in the seventh round of the 2023 MLB Draft out of the University of Tennessee.
Romano, 33, made 11 relief appearances earlier this season for the Los Angeles Angels and went 0-2 with four saves, a 10.13 ERA, six walks and 12 strikeouts in eight innings.
The Angels released him on April 27 and he signed with Colorado on May 6.
Romano has a career 22-23 record with 117 saves and a 3.92 ERA in 291 games, all in relief, with the Toronto Blue Jays (2019-24), Philadelphia Phillies (2025) and Angels (2026). He was an All-Star with the Blue Jays in 2022 and 2023.
He was 1-1 with one save and a 3.72 ERA in 10 relief appearances with the Rockies' Rookie (one game) and Triple-A (nine) affiliates this year.
--Field Level Media
