LOS ANGELES -- Battling a strained left hamstring injury, Dodgers left fielder Juan Rivera was out of the lineup for Friday's series opener against the Nationals.
However, Rivera did take ground balls and batting practice on Friday to see how the hamstring had progressed. The team still believes the injury is day to day.
"We are still hopeful that this thing isn't going to linger," manager Don Mattingly said. "He feels a lot better today then he did yesterday."
Rivera strained the hamstring running out a sixth-inning infield single on Tuesday against the Braves. He was out of the Dodgers' lineup on Wednesday.
"We are still hopeful that we won't have to put him on the disabled list, and that it will just be a couple of days," said Mattingly.
In 17 games with the team this season, Rivera is batting .263 with one home run and nine RBIs.
Guerra doing well two days after getting hit
LOS ANGELES -- After being hit in the face by a line drive during Wednesday's game against the Braves, Javy Guerra showed no visible signs of the incident as he walked through the Dodgers' clubhouse before Friday's game against the Nationals.
While Guerra had a swollen right jaw after the game, he had no bruising or swelling in the area two days later.
It is a great sign for Guerra, who has bounced back remarkably well after surviving the Brian McCann shot in the ninth inning.
"He really came out of everything pretty good, especially from the neck up," Dodgers manager Don Mattingly said. "Nothing is structurally wrong with the jaw, he has no concussion symptoms. Everything came out clean with that stuff."
Mattingly said the only issue for Guerra is that the closer has a little discomfort in his right knee and the top of his right foot, from twisting to get out of the way of the ball.
Even after throwing before Friday's game, Guerra will likely take a day off from game action, with the team and doctors believing he just has short-term aggravation with no structural damage.
Looking at tape of the hit after the Dodgers' 4-2 loss on Wednesday, Mattingly said if he would have known the ball hit Guerra straight on, he would have taken him out.
"It really is remarkable after watching the tape a few times that night," Mattingly said. "Staying out there really shows Javy's toughness. It is quite remarkable."
During Los Angeles' off-day on Thursday, Guerra said he didn't have any special treatment and was able to chew food normally without any jaw pain.
"The doctor said my jaw line is good, and a stronger muscle than usual," Guerra said. "You just have to go back out there. It is part of the job."
Dodgers add righty Eovaldi to bullpen
LOS ANGELES -- Getting another arm in the bullpen before the start of the team's three-game series against the Nationals, the Dodgers recalled right-hander Nathan Eovaldi from Double-A Chattanooga, and optioned left-hander Michael Antonini to Triple-A Albuquerque on Friday.
"This is something we had planned from the beginning," manager Don Mattingly said. "Because Atlanta was a lefty-heavy ballclub, Antonini made sense then. We see Eovaldi being up here for the short term."
While Mattingly still sees Eovaldi as a starter for the long term, he believes this is a great opportunity to keep the right-hander's innings down and give him experience in the Majors.
Eovaldi was pulled from his start with Chattanooga after just one inning on Wednesday in preparation for the callup. In 13 innings in Double-A this season, Eovaldi has allowed three runs and three walks, with 14 strikeouts.
With the Dodgers at the end of last season, Eovaldi tallied six starts and came out of the bullpen four times. In those four outings, he tossed 2 2/3 innings, giving up three runs on three hits.
"I don't think it will be too tough for me to come out of the bullpen, I did it last year," Eovaldi said. "My arm has always warmed up easily."
Eovaldi's time with the Dodgers will likely be limited though, with reliever Todd Coffey able to come off the disabled list on Sunday.
Quinn Roberts is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.