Bolt signed a minor-league contract with Atlanta on Feb. 23.
Bolt was reassigned Tuesday to the minor-league side of Brewers camp, Adam McCalvy of MLB.com reports.
Bolt signed a minor-league contract with the Brewers on Friday and received an invitation to major-league spring training, Adam McCalvy of MLB.com reports.
The Athletics reinstated Bolt (knee) from the 10-day injured list Wednesday and outrighted him to Triple-A Las Vegas.
Bolt (knee) went 3-for-10 with two doubles and three RBI while playing all nine innings in two rehab games for Triple-A Las Vegas against Sacramento on Saturday and Sunday.
Bolt (knee) started and played seven innings in left field for Triple-A Las Vegas on Thursday, going 1-for-4 with an RBI single.
Bolt (knee) went 1-for-4 with a run-scoring groundout and an RBI double in Triple-A Las Vegas' loss to Sacramento on Wednesday.