Yonder Alonso is not in Monday's lineup against the Rangers.
Yonder Alonso's eight-game hitting streak was snapped with an 0-for-4 Saturday against the Rays.
Yonder Alonso will start at third base Tuesday against the Red Sox.
Yonder Alonso hit a three-run homer off Pat Neshek in the bottom of the ninth to give the A's a 7-4 win over the Astros on Friday.
Yonder Alonso went 0-for-4 with two strikeouts on Monday, leaving him with a .115 average.
Yonder Alonso hit a game-tying two-run single in the eighth inning of Tuesday's loss to the White Sox.
Athletics and 1B Yonder Alonso avoided arbitration by agreeing to a one-year, $2.65 million contract.
Athletics acquired 1B Yonder Alonso and LHP Marc Rzepczynski from the Padres for LHPs Drew Pomeranz and Jose Torres and a player to be named later or cash considerations.
Susan Slusser of the San Francisco Chronicle reports that the Athletics have acquired first baseman Yonder Alonso from the Padres for left-hander Drew Pomeranz.
ESPN's Keith Law reports that the Padres and Athletics are close to a trade that would send Yonder Alonso and Mark Rzepczynski to Oakland for Drew Pomeranz and Jose Torres.
Padres activated 1B Yonder Alonso from the 60-day disabled list.
Padres placed 1B Yonder Alonso on the 60-day disabled list, retroactive to September 2, with a stress reaction in his back.
A bone scan of Yonder Alonso's ailing lower back revealed a stress reaction.
Yonder Alonso felt continued tightness in his lower back while swinging a bat recently.