"We're going to give him some more time off and get that straightened out," D-backs manager Kirk Gibson said on Tuesday.
The team is hopeful that Bloomquist will not need to go on the disabled list, but the back issue could be a reason why shortstop Stephen Drew was not dealt before the Trade Deadline.
Gibson said the team had not yet decided whether outfielder Scott Podsednik, one of the players the team acquired Tuesday, would report to Triple-A Reno or join the big league squad. One factor could be the health of Bloomquist. If he needs to go on the DL, it's possible the team could use Podsednik in a reserve role.
"We'll see how he feels when he gets up," Gibson said when he was asked if Bloomquist would be available Wednesday. "[The trainers] have been working on him. He's had it before, and it's usually a day or two thing."