Cano told the manager about the pain after he popped out in his third at-bat. Cano said he still could play second base, so Girardi left him in before pinch hitting for him in the eighth inning.
X-rays taken after the game were negative. Cano will try to play Monday night in Detroit, according to a Yankees spokesman.
Cano went 1-for-3 and has a hit in 19 of the last 20 games.
Millwood opts out
The Yankees had until Sunday to add the righthander to the major-league roster but decided to pass after his recent poor start with Triple-A Scranton/Wilkes-Barre. He allowed six runs and seven hits, including two home runs, in two innings Thursday.
Millwood, 36, signed an incentive-laden deal during spring training. He was 2-1 with a 4.50 ERA in two starts for Scranton and one for Double-A Trenton.
Hughes' exam today
Phil Hughes is scheduled to visit vascular specialist Dr. Robert William Thompson in St. Louis Monday to determine whether he has thoracic outlet syndrome. If he does, Cashman has said it could result in season-ending surgery.
Hughes has been on the disabled list since April 15 because of weakness in his right shoulder, and the Yankees have been unable to find the source of the problem. They ran tests on him last week, and the result of a vascular exam to check circulation led them to seek out a specialist.
Girardi admitted Sunday that he has "concern" about Hughes, who has struggled to generate his usual low-90s velocity since spring training. Said Girardi: "I think all of us are somewhat curious as to what exactly is going on.''