© 2014 MLB Advanced Media, L.P. All rights reserved.

9/2/2014 10:01 P.M. ET

LaRoche sits, gets treatment for ailing back

LOS ANGELES -- Nationals first baseman Adam LaRoche was given the day off Tuesday because of lower back tightness. Manager Matt Williams didn't rule out LaRoche having the day off Wednesday afternoon. Including the off-day on Thursday, LaRoche could have three days off.

"We are going to give him today and evaluate tomorrow morning and see how he is," Williams said.

LaRoche has been dealing with back problems for the entire road trip, but the pain grew worse in his final at-bat in the fifth inning against the Dodgers on Monday. LaRoche said he took muscle relaxers and the back feels "a little better." He was expected to spend most of Tuesday getting treatment.

"I don't know if that's temporary. … I would assume today is more treatment than actually going in and pushing it," LaRoche said.

During the current road trip, LaRoche is 1-for-23 and has seen his average drop to .257 for the season. He said the back problems had nothing to do with his recent slump.

"I felt it this whole road trip," LaRoche said. "The last two days was really the only time I felt it swinging. Before that, I felt it on defense, but I didn't feel it hitting [until recently]."

With LaRoche out, Kevin Frandsen received the start against Dodgers left-hander Clayton Kershaw.

Worth noting

• Nationals center fielder Denard Span received a scheduled day off against the Dodgers on Tuesday. Span and manager Matt Williams planned the off-day as recently as Monday.

• Agent Scott Boras took the ALS Ice Bucket Challenge and his clients Stephen Strasburg , Bryce Harper, Danny Espinosa, Anthony Rendon and Rafael Soriano poured ice water on the representative.

Bill Ladson is a reporter for MLB.com and writes an MLBlog, All Nats All the time. He also can be found on Twitter @WashingNats. This story was not subject to the approval of Major League Baseball or its clubs.