Yamaguchi was released by the Giants on Thursday and will head home to Japan to pitch in NPB, Andrew Baggarly of The Athletic reports.

The Giants reassigned Yamaguchi on Sunday, Alex Pavlovic of NBC Sports Bay Area reports.

Yamaguchi signed a contract with the Giants on Saturday, Susan Slusser of the San Francisco Chronicle reports.

Yamaguchi was released by the Blue Jays on Saturday, Scott Mitchell of TSN.ca reports.

The Blue Jays designated Yamaguchi for assignment Thursday, Hazel Mae of Sportsnet reports.

Yamaguchi will not be a part of the Blue Jays' Wild Card roster.

Yamaguchi is expected to work as a primary pitcher in Tuesday's game against the Marlins in Miami, Ben Nicholson-Smith of Sportsnet.ca reports.

Yamaguchi (1-2) allowed one run on two hits (one home run) and two walks while striking out two across four innings of work as he earned the win over the Red Sox on Wednesday.

Yamaguchi tossed 2.2 scoreless innings out of the bullpen Thursday in the Blue Jays' 9-8 win over the Phillies in the second half of a doubleheader. He allowed no hits and two walks and struck out four.

Yamaguchi is expected to fill a relief role for the Blue Jays to begin the season, Shi Davidi of Sportsnet.ca reports.