The Nationals first baseman fouled a ball off his foot in Tuesday night's contest and was still feeling some discomfort.
Nationals manager Davey Johnson said LaRoche received treatment on his foot Wednesday morning -- specifically the arch -- and told Johnson he could probably play, but the skipper elected to give his slugger a day off. Washington has an off-day Thursday, so this will allow LaRoche to get some extra rest.
- 142 wins
- 110 wins
"I think he'll be fine, [but] he hit it pretty good," Johnson said. "This field is pretty hard, so might as well give him today."
Toronto's home park, Rogers Centre, has an artificial-turf surface, which is considered much more strenuous on the body, especially the lower half, than natural grass.
LaRoche is having a strong comeback season after being limited to 43 games in 2011 following shoulder surgery, and he is providing the Nationals with production in the middle of the lineup.
The 32-year-old had a team-leading 11 home runs and 42 RBIs -- tied for fourth best in the National League entering play Wednesday -- and was among the top 10 NL leaders in walks, with 29.
Rookie Tyler Moore got the start at first in LaRoche's absence and batted seventh. The 25-year-old Moore was hitting .222 over 27 at-bats this season.