The San Francisco Giants placed right-hander Logan Webb on the 10-day injured list on Thursday due to a right shoulder strain.
The move is retroactive to May 18.
In a corresponding move, left-handed reliever Jose Alvarez was activated from the injured list.
Webb, 24, was scheduled to pitch Saturday night in a key early season showdown with the Los Angeles Dodgers, who begin a three-game series with the Giants on Friday in San Francisco.
Entering play Thursday, the Giants lead the National League West by 1/2 game over the San Diego Padres and two games over the Dodgers. The Giants have the best record in the major leagues.
An MRI on Wednesday revealed the strain.
“We’ll continue to monitor and treat and work hard to get him ready as quickly as possible,” manager Gabe Kapler said, with the hope that Webb misses just one start.
On the season, Webb is 3-3 with a 4.09 ERA in nine appearances (eight starts). In 44 innings, he’s given up 21 runs (20 earned) on 45 hits and 17 walks, striking out 47.
Alvarez, 32, hasn’t pitched since May 9 because of a right ankle sprain. Alvarez (1-1, 4.35) has thrown 10 1/3 innings over 12 games, with opponents scoring eight runs (five earned) on 11 hits and nine walks. He has struck out 11.
–Field Level Media