Rajai Davis, one of the A's key offseason acquistions, is headed to the 10-day disabled list due to a strained left hamstring.
The move is retroactive to April 22.
The A's also designated Rual Alcantara for assignment. The 24-year-old who was acquired in the 2011 Andrew bailey trade with Boston won the fifth starter job out of spring training, but posted a 16.71 ERA in three appearances this season.
To take their spots, the A's recalled right-handed pitcher Cesar Valdez and recently-acquired outfielder Ryan LaMarre.
Valdez,32, was recalled on April 20 to start against the Mariners. He allowed five hits and three earned runs in four innings. He was optioned to Triple-A Nashville the following day.
The 28-year-old LaMarre was acquired from the Angels on Sunday. In his only game with Triple-A Nashville on Monday, he went 1-for-5 with three strikeouts.
OAKLAND -- The Oakland A’s acquired outfielder Ryan LaMarre from the Los Angeles Angels in exchange for a player to be named later or cash considerations, the club announced Sunday.
LaMarre will report to Triple-A Nashville. To clear a spot on the 40-man roster, the A’s transferred right-handed pitcher Chris Bassitt to the 60-day disabled list.
LaMarre was batting .268 with seven RBI, six walks and four stolen bases in 10 games at Triple-A Salt Lake when he was designated for assignment on Tuesday. He was signed by the Angels as a free agent following the 2016 season and has a .267 average with 46 home runs, 222 RBI and 160 stolen bases in 656 games in the minors over eight seasons in the Cincinnati (2010-15), Boston (2016) and Angels (2017) farm systems.
The 28-year-old right-handed hitter made his Major League debut with the Reds in 2015 and also appeared in five games with the Red Sox last year. LaMarre is 2-for-30 (.067) in 26 games over his two seasons in the majors.
The Oakland A's media services provided this report.