Osuna agreed to a contract with the Chiba Lotte Marines of Nippon Professional Baseball in Japan on Friday, Jon Heyman of MLB Network reports.

Osuna (elbow) passed through outright waivers unclaimed Friday and elected free agency rather than accept an assignment to Triple-A, Brian McTaggart of MLB.com reports.

Osuna (elbow) was placed on outright waivers by the Astros on Thursday, Jake Kaplan of The Athletic reports.

General manager James Click said Saturday that Osuna (elbow) recently resumed throwing, Chandler Rome of the Houston Chronicle reports.

The Astros are hoping Osuna (elbow) can return later this season after rehabbing, Jake Kaplan of The Athletic reports.

Osuna (elbow) was transferred to the 45-day injured list Sunday.

Osuna's (elbow) initial diagnosis is that he needs Tommy John surgery, Mark Berman of Fox 26 reports. He is getting a second opinion.

Astros manager Dusty Baker said, "The reality is it's probably not really good news," when asked about Osuna's elbow injury Tuesday, Brian McTaggart of MLB.com reports.

The Astros placed Osuna on the 10-day injured list Sunday with right arm soreness, Brian McTaggart of MLB.com reports.

Osuna will return to Houston to undergo an MRI after leaving Saturday's game with right arm discomfort, Chandler Rome of the Houston Chronicle reports.