Barrett agreed Tuesday with the Phillies on a minor-league contract, Todd Zolecki of MLB.com reports.
The Nationals activated Barrett (knee) from the 7-day injured list at Triple-A Rochester and assigned him to Double-A Harrisburg on Tuesday, independent sports writer Byron Kerr reports.
Barrett (knee) has reported to Low-A Fredericksburg for a rehab assignment, Jesse Dougherty of The Washington Post reports.
Barrett (knee) was assigned to minor-league camp Saturday, Mark Zuckerman of MASNSports.com reports.
Barrett underwent right knee surgery this week and has returned to Nationals camp, Jesse Dougherty of The Washington Post reports.
Barrett (triceps) re-signed Thursday with the Nationals on a minor-league contract, Brittany Ghiroli of The Athletic reports.
Barrett (triceps) became a free agent Saturday, Mark Zuckerman of MASNSports.com reports.
Barrett (triceps) cleared waivers and was outrighted to Triple-A Fresno on Friday, Mark Zuckerman of MASNSports.com reports.
Barrett was placed on the 10-day injured list with a right triceps strain Monday, Jessica Camerato of MLB.com reports.
Barrett experienced right triceps soreness during his appearance in Friday's game against the Marlins and could be placed on the 10-day injured list, Mark Zuckerman of MASNSports.com reports.