The 25-year old Ysla has pitched for the Portland Sea Dogs this season. They play in the Double-A Eastern League. He was designated for assignment on July 26, 2017.
The Dodgers said Ysla will be optioned to the Tulsa Drillers.
Ysla has appeared in 29 games, pitching 46⅓ innings, he’s allowed 28 runs (26 earned), 47 hits and 32 walks. Ysla has 44 strikeouts this season.
Ysla was originally signed by the San Francisco Giants in 2012 and was traded to the Red Sox for outfielder Alejandro De Aza on August 31, 2015.
As the corresponding move, first baseman Adrián González will be moved to the 60-day disabled list, retroactive to June 12th.
Earlier on Saturday, manager Dave Roberts said González would start a rehab assignment next week, this move should not affect that though more will be known after González plays his simulated game on Sunday.