Stubbs opted out of his minor league contract Tuesday in hopes of finding a major league job. He had finished last season in Texas and re-signed with the team early in spring training.
The Rangers also Tuesday optioned right-hander Nick Martinez to Triple-A Round Rock.
A.J. Griffin could be the top candidate for the fifth spot in the Texas rotation. Martinez was sent to the minors a day after veteran right-hander Jeremy Guthrie was granted his release and a few days after Chi Chi Gonzalez was optioned to Round Rock.