The Dodgers released Arauz on July 2.
Arauz signed a minor-league contract with the Dodgers on Dec. 15.
Arauz elected to become a free agent Tuesday.
The Mets placed Arauz on outright waivers Friday, Anthony DiComo of MLB.com reports.
Arauz was optioned to Triple-A Syracuse on Monday, Anthony DiComo of MLB.com reports.
Arauz hit a three-run home run in his only plate appearance during Thursday's 11-1 rout of Arizona.
Arauz is out of the lineup for Sunday's game against the Angels.
Arauz is out of the lineup for Wednesday's game against Atlanta.
Arauz will start at third base and bat ninth in Sunday's game against the Cardinals.
Arauz went 1-for-4 with a solo home run in Tuesday's 7-4 loss to the Pirates.