Andrew Romine, who was recalled from Triple-A Salt Lake on Aug. 2, was given the start at shortstop.
Aybar's average has tumbled from .283 to .262 during his slide, which has spanned all of August. A switch-hitter, he began the day hitting .286 against right-handed pitchers and .206 against left-handers. The Blue Jays started left-hander Ricky Romero on Saturday and are scheduled to deploy left-hander Brett Cecil on Sunday.
Aybar entered the weekend with seven home runs this season after hitting five in each of the past two seasons. His two most recent homers were on July 8 and 16.
"Sometimes, when a little guy hits a home run, sometimes they start to get a little long with things," manager Mike Scioscia said before Saturday's game. "Right after he hit the home run, we talked to him and said, 'Stay short and let the home run be a mistake.' He's hit a couple of balls hard during his streak recently.
"It could be that his swing's a little long, it could be a little bit of fatigue. We're giving him the day today just to kind of catch his breath. Through it all, he's running well and he's playing Gold Glove defense. So this streak is probably a little long for the type of hitter that he is."