Yamamoto (4-1) got the win over the Marlins on Tuesday, allowing two runs on five hits while striking out five over eight innings.
Yamamoto (3-1) earned the win over the Diamondbacks on Wednesday, allowing five hits and two walks over six scoreless innings. He struck out five.
Yamamoto pitched five scoreless innings in a win against the Cubs on Saturday, allowing five hits and two walks while striking out eight.
Yamamoto pitched five scoreless frames in a no-decision in Saturday's 6-5 extra-inning lost to St. Louis, allowing two hits and no walks while striking out five batters.
Yamamoto (0-1) took the loss to the Padres on Thursday in the second game of the Seoul Series. He allowed five runs on four hits and a walk while striking out two over one inning.
Yamamoto is scheduled to start the Dodgers' second game of the regular season March 21 versus the Padres in Seoul, South Korea.
Yamamoto was tagged for five runs on six hits and three walks over three innings Wednesday in Cactus League action versus the White Sox.
Yamamoto is listed as the Dodgers' starting pitcher for Wednesday's Cactus League game against the Rangers, Fabian Ardaya of The Athletic reports.
The Dodgers plan to give Yamamoto a start during their two-game season-opening series against the Padres in South Korea on March 20 and 21, Dylan Hernandez of the Los Angeles Times reports.
Yamamoto was officially posted Monday by the Orix Buffaloes of Japan's Nippon Professional Baseball and will be eligible to begin negotiating with MLB teams Tuesday, Joel Sherman of the New York Post reports.