The San Francisco Giants recalled Carson Seymour to the major leagues for the first time on Friday and optioned right-hander Sean Hjelle to Triple-A Sacramento.
The move comes in advance of a three-game road series against the Chicago White Sox and at the start of a 10-game road trip.
Seymour, 26, is a former sixth-round draft pick by the New York Mets in 2021, who was traded to the Giants a year later. He was 3-8 with a 3.89 ERA in 15 starts for Sacramento this season.
Hjelle, 28, is 1-1 with a 6.75 ERA in nine appearances (one start) for the Giants this season. Over four seasons in San Francisco, he is 7-8 with a 4.97 ERA in 90 appearances (one start).