Castillo retired from professional baseball on Sunday, Jesse Dougherty of The Washington Post reports.

Castillo (shoulder) has appeared in five games this season for Triple-A Rochester, going 3-for-11 with seven walks and an RBI.

Castillo (shoulder) was assigned to minor-league camp Saturday, Mark Zuckerman of MASNSports.com reports.

Nationals manager Dave Martinez said Wednesday that Castillo has been battling a shoulder injury since the start of camp, but the catcher has since been cleared to resume a throwing program, Jesse Dougherty of The Washington Post reports.

Castillo signed a one-year minor-league deal with the Nationals on Monday, Bob Nightengale of USA Today reports.

The Nationals placed Castillo (opt out) on the restricted list July 4.

Manager Dave Martinez announced Friday that Castillo has opted out of the 2020 season, Jesse Dougherty of The Washington Post reports.

Castillo (shoulder) is in the lineup for Saturday's split squad game against the Marlins, Mark Zuckerman of MASNSports.com reports.

Castillo is dealing with a sore right shoulder, Mark Zuckerman of MASN Sports reports.

Castillo signed with the Nationals as a non-roster invitee Friday, Jesse Dougherty of The Washington Post reports.