Bolt was optioned to Triple-A Las Vegas on Wednesday.
EDGE Analysis
Bolt served in a depth role with the big-league club across the last two weeks, but he'll return to the minors after Ramon Laureano (hip) was reinstated from the 10-day injured list Wednesday. The 27-year-old went 1-for-13 with a solo home run and three strikeouts during his most recent stint with the Athletics.