The Yankees' second baseman was hitting .224 through 22 games in September entering Tuesday's contest against the Twins. That average is Cano's lowest in a single month this season and his lowest for a regular-season month (excluding October) since he hit .151 in April 2008.
Cano's cold September has dropped his average from .304 to .293.
"He's not making the solidest contact on a consistent basis right now," New York manager Joe Girardi said. "Could it be that he's playing a lot of games? Sure. Could it be that our schedule's been kind of rough? Sure. But it's that time of year -- you have to fight through some things."
Cano got a half-day of rest on Tuesday, serving as the designated hitter and batting cleanup against Minnesota. He had started 142 of New York's 153 games at second base, starting another eight as the DH.
"He's played a lot, so it's just kind of getting him a day off his legs a little bit -- try to refresh him a little bit," Girardi said. "I don't know how much you can refresh a guy at this time of year, though."
Girardi also said he isn't worried about Cano's recent slump.
"You just know how good of a hitter he is and that he's more than likely to come out of it," Girardi said. "It'd be great for it to happen soon, but guys go through it. They go through their struggles."