"We feel like it's a day or two days," Mattingly said on Thursday afternoon. "We'll see how that goes."
Could Ellis require a stint on the disabled list?
"If this thing would go the wrong direction, it would be [a DL situation]," Mattingly said.
Ellis played Tuesday's game against the Angels with discomfort in his left side, but was able to throw out Erick Aybar attempting to steal second and went 1-for-3. The catcher dealt with a similar issue during Spring Training, but only missed a few days.
With Ellis' health in question, the Dodgers recalled catcher Tim Federowicz from Triple-A Albuquerque on Thursday to fill the roster spot that opened when Matt Kemp was placed on the disabled list with a mild right hamstring strain.
Federowicz was the starting catcher on Thursday, with veteran catcher Ramon Hernandez getting the start as the designated hitter.