Reed signed a minor-league contract Monday with the Rangers.
Reed was released by Oakland on Tuesday, Melissa Lockard of The Athletic reports.
Reed (undisclosed) was reinstated from the 7-day injured list Thursday, Melissa Lockard of The Athletic reports.
Reed has been sidelined since June 8 with an undisclosed injury.
Reed (quadriceps) is slashing .267/.371/.433 with four extra-base hits (three doubles, one triple) and two stolen bases across 35 plate appearances for Triple-A Las Vegas.
Reed suffered a right quad strain while hitting in the cages Tuesday, Martin Gallegos of MLB.com reports.
Reed, who is angling for an Opening Day roster spot in the outfield, caught the eye of manager Bob Melvin with both his bat and glove over the Athletics' first two Cactus League games, Martin Gallegos of MLB.com reports.
The Athletics announced Monday that Reed will report to big-league spring training as a non-roster invitee.
Reed is part of the 60-man player pool that will report to the Athletics' summer camp, Martin Gallegos of MLB.com reports.
Reed was traded to the Athletics on Thursday in exchange for Jurickson Profar.