Locklear owns a .409 average and 1.162 OPS with a double, two home runs, five RBI, a walk and seven runs over the 23 plate appearances he's logged with Triple-A Tacoma since being optioned July 30.
The Mariners optioned Locklear to Triple-A Tacoma on Tuesday.
Locklear is out of the lineup for Monday's game against the Red Sox.
Locklear, summoned from Triple-A Tacoma earlier in the day, went 1-for-4 in a loss to the Angels on Tuesday.
The Mariners recalled Locklear from Triple-A Tacoma, and he's starting at first base and batting sixth Tuesday against the Angels.
The Mariners optioned Locklear to Triple-A Tacoma on Monday.
Locklear is out of the lineup for Wednesday's game against the Guardians.
Locklear went 0-for-3 with a walk and a stolen base in a loss to the Rangers on Saturday.
Locklear went 1-for-4 with a solo home run in an extra-inning loss to the White Sox on Thursday.
Locklear, who was called up from Triple-A Tacoma earlier in the day, went 1-for-4 with an RBI double and a run in an extra-inning win over the Royals on Sunday.